NB: This article was written on 7th March 2020 when the number of cases and confirmed deaths was lower than it is today. I have chosen to leave the article unedited however, so you can read it in its original form. While the body count has changed, the overall message and scientific approach for tackling Coronavirus has not.
I've been holding back on writing a Coronavirus article for three main reasons. First, I don't want to get sucked into the circus because there's already enough people writing about it and it would seem gimmicky to join in. Second, solid information on Coronavirus is pretty sparse, so I figured there wouldn't be much to say beyond speculation. Third, I don't think I'm actually very good at writing about serious stuff - I'm much better at making Batman jokes than tackling something as unpleasant as a virus that kills people.
However, it occurred to me that a disease outbreak is one of those times when everybody actually wants to get engaged with science and seeing as how both my jobs (teacher and author) revolve around teaching science, it would be pretty dumb to stay silent at a time like this. It's also just about reaching the point where reliable information is beginning to crystalise so, in the name of cheerful weekend blogging, here's my two cents on Coronavirus.
Don't Tell Me What it Is...Tell Me How To Survive!
Most articles and blogs start by explaining what the virus is. My hunch is that most people aren't reading because they want to learn about virology however, it's because they want to know whether they and their loved ones are at risk, which is totally understandable. If an asteroid was heading for Earth people wouldn't care about its orbital mechanics...they'd just want to know if we've contacted Bruce Willis yet. So I'll give a cursory summary of the biology, but feel free to skip this section if you want.
A virus is a semi-living box of chemicals that can damage the cells of an organism it infects. Because viruses aren't exactly living things, you can't "kill" them with antiobiotics so your main defence is to rely on your rather amazing immune system. Antiviral medications do exist for certain viruses but there aren't any blanket "kills 99% of viruses" medicines out there - viruses don't work the same way bacteria do.
Obviously you can and should give your white blood cells a thorough practice run against a virus by getting yourself vaccinated, but typically if you contract a virus you have to just wait it out and let your body go to work.
Coronaviruses are a group of viruses we've known about since the 1960s and while most of them aren't harmful, there are a few versions which are. Some Coronaviruses, like NL63 and HKU1 cause common colds, but some strains are way more problematic. The two most dangerous are SARS and the one that's all over the news right now, usually given one of two technical names, either SARS-Cov2 (Severe Acute Respiratory Syndrome Coronavirus 2) or COVID-19 (Corona Virus Disease 2019).
We don't know where the original particle of SARS-Cov2 came from, and we probably never will, but analysing its DNA has shown that it's 90% similar to a version previously confined to the bat population. This means there's a good chance SARS-Cov2 started out as a bat virus but then infected another animal which wound up in the Huanan Seafood Market in Wuhan, China, around December 2019.
Oh and if you're curious, it gets its name from the fact that under a microscope the virus particles look like they have little crowns around them and the Latin for crown is corona (you know how much scientists love translating words into Latin). For the rest of the blog, I'll use the word "Coronavirus" to refer specifically to the one that's currently causing all the problems.
What Does it Do To You?
Coronavirus particles mostly cause damage to the cells in your respiratory system and when your immune system fights back the internal battle is what generates the most common symptoms...
1) Fever (your immune system produces a bunch of chemicals called pyrogens which tell the brain to increase cell production - like making more virus fighting soldiers - which causes things to heat up)
2) Cough (obviously...it's a virus in your lungs)
3) Tiredness and fatigue (your immune system uses up your body's energy to destroy the infection so you don't have much left over for other stuff)
4) A bunch of phlegm (a byproduct of your immune system breaking down the virus - like an icky slurry of dead white blood cells and burst virus particles)
5) Shortness of breath (obviously...it's a virus in your lungs)
6) Sore throat (obviously...your throat is attached to your lungs)
As you can see from this list, the symptoms of a Coronavirus infection are very similar to other viral infections because your body only has a limited number of ways to tell you something is wrong. In its most rare and severe cases however, Coronavirus can cause major damage to your lungs and the Greek for "lung disease" is pneumonia (scientists love Greek names too).
It's potentially confusing that we don't just call pneumonia "bad lung problem" because I've heard a bunch of people getting muddled and thinking it's a separate virus, but pneumonia is just the name of the symptom. About 4 million people die every year from bacterial or viral pneumonia and Coronavirus is the latest thing which can cause it.
How Dangerous Is It?
This is a complicated question to answer because biology isn't a straightforward cause=effect science. There are no absolutes in medicine and what works for one body will not necessarily work for another. Biology works statistically and, unfortunately, statistics is something we're usually quite bad at as a species. The human brain is built for straightforward calculations so when you get something that requires probability, risk-benefit analysis, overlapping categories and middle-of-the-road conclusions we tend to fall short.
So far the response to Coronavirus has either been to get into hysterics and panic buy food from supermarkets or to dismiss it as "a bunch of hype that'll blow over in a few weeks like Swine flue, Bird flu, Ebola and Zika". The reality is that Coronavirus is actually somewhere in between these two extremes and the danger depends on a lot of factors. Getting worked up and spraying your armchair with bleach is probably going too far, but ignoring the whole thing isn't helpful either. Like I said, it's one of those awkward medium-ground things that depends on context.
Right, But Seriously...How Dangerous Is It?
When you're talking about the danger of an infectious disease there are two main things you need to take into account. One is called the R0 value (pronounced R- naught) and one is the mortality rate.
R0 is a measure of how easily an infection spreads i.e. how contagious it is. There are lots of things which go into calculating it, such as how long the virus stays in the body before symptoms show, how long an infection lasts, how easily it can be transferred etc. but roughly speaking the higher the R0 number, the more contagious.
An R0 value of less than 1 means it's quite hard to contract the disease.
An R0 value of exactly 1 means every infected person will infect 1 other.
An R0 value greater than 1 means each infected person infects several others.
When the R0 value is greater than 1 it means each person who catches it will infect several others, leading to what's called an epidemic or an outbreak. The number of cases will grow at a faster and faster rate but it's important to note that R0 is geographically dependent. For instance, the R0 value in Antarctica is going to be a lot lower than it would in Manila (the densest city in the world) because there are less people to infect. As a result, R0 values are usually given as a range. The more densely populated your surroundings, the closer you'll be to the higher figure. Here are some common R0 values for comparison.
Measles 12 - 18
Chickenpox 10 - 12
Polio 5 - 7
HIV 2 - 5
Seasonal Flu 2 - 3
Ebola 1.5 - 2.5
Swine Flu 1.46 - 1.48
Coronavirus has an R0 of 1.4 - 3.8 so if you're living in a really densely populated place like the Hubei province of China, Coronavirus will spread faster than the flu, but if you're living in the Scottish highlands it's probably going to spread slower than Swine flu.
If it gets to the point where the outbreak is found in the majority of countries across the world, the World Health Organisation will declare it a "pandemic". That doesn't mean the majority of people have got it, it just means the majority of countries have at least one confirmed case.
At the moment it's hard to predict whether Coronavirus will become a pandemic but I'm going to be straight - it does seem a distinct possibility. One of the problems is that because the symptoms aren't too dissimilar to a lot of other diseases a lot of people contract it and don't even realise, shrugging it off as "a cough". That makes it difficult to catch because if we quarantined everyone who had a cough we'd be quarantining tens of millions of people.
With the SARS outbreak of 2003 we were able to contain the infection because the symptoms and the transmission went hand in hand, but Coronavirus is sneaky and people can be carrying it around without showing any signs.
I'm not wanting to be all doom-and-gloom and it's obviously possible that we've identified it early enough to stop further spread...but I want to be realistic. There is a very real chance Coronavirus is going to keep spreading and we might end up with a pandemic.
This is the really grim bit. Of the people who get Coronavirus, how many end up with a pneumonia so serious it shuts down their ability to breathe? The answer, again, depends on who you are and where you live. If we take something like seasonal flu for instance, that has a mortality rate of 0.1% in the US. In Nigeria however it's the number one cause of death. Likewise, something like Ebola has a mortality rate of 90% but it largely affects areas with poor healthcare and widespread poverty.
The World Health Organisation official number for Coronavirus right now is 3.4% but that statistic can be misrepresented to the point of not being useful. The mortality rate in China is currently 3.8% but that's a country with a dense population and the highest rate of smoking in the world (around 28% of the population).
By contrast, the mortality rate in the UK is, at the time of writing, 2.4%. That raw percentage makes the death rate in Britain seem almost as bad as that of China. But in fact only two people in the UK have died from Coronavirus, one of whom had an underlying illness and one of whom was 88. Giving a percentage when there's such a small number of cases is probably not the best way of expressing the data.
The really interesting statistic to my mind is that of South Korea where there are over 6,500 confirmed cases, but a 0.6% mortality rate. The explanation is currently not known. It could be that South Korea is doing something differently or it could be a statistical blip. Some countries are, by pure chance, going to have less deaths than others. We don't know at the moment.
There's also the fact that the WHO 3.4% number is based on the number of reported cases. But because a lot of people get Coronavirus and don't even realise, they never report it so the actual number of cases could be much higher, meaning the mortality rate would be a lot less.
The mortality rate of Coronavirus could in truth be lower than 3.4% but that's still not brilliant. The last time we saw something like this it was Spanish flu in 1918 which had an R0 value of 2-3 and a mortality rate of 3% (very comparable) but because we didn't contain the spread effectively, a third of the world's population contracted it and about 30 million people died. So although those numbers might seem quite low, if we ignore Coronavirus and don't take it seriously, we could be facing a major problem.
You're Fine But Your Neighbour Might Not Be
As I said earlier, my gut feeling is that when people read about Coronavirus they either want to be reassured that they and their families are safe or they want to be warned if they are in danger and told what precautions to take. The tricky bit is therefore how we package the answer when people ask if they're at risk.
If we tell people the short answer: "the vast majority of people who get Coronavirus are going to be absolutely fine" then that is completely accurate but it means they will mentally file Coronavirus under the nothing to worry about category in their brain. That's understandable because that's how our brains work - if something is not an immediate threat, our brain relaxes and stops taking it seriously. But we need to be more sophisticated about how we approach Coronavirus. Here's why...
We currently don't have a vaccine for Coronavirus and developing one could take up to a year or longer. That means between now and then if you contract it, you're basically on your own. Most people have functioning immune systems so their body will take care of it just fine, but people who don't have good immune systems are at risk. The WHO 3.4% mortality rate is an average of young and old people but if you're 70-79 the mortality rate jumps to 8% and if you're 80 or over it jumps to 15%. That's significantly worse than seasonal flu.
Most of the people asking me abut Coronavirus are teenagers and the answer for them is that they're in the lowest risk category (0.2% mortality rate). So for most of my readers you don't need to be alarmed even if it does get to pandemic stage. If you contract it you'll most likely have a cough for a few days but then your body will work its magic and you'll feel fine again. But you could carry the infection and transfer it to your grandparents and then it could be a lot more serious.
It's rarely a good idea to express a complicated idea in a simple soundbite of a few sentences but on the other hand, people remember succinct answers better than essays. So, for what it's worth, from a scientist's perspective this is roughly the deal with Coronavirus...
As a general rule, healthy and young people are not at serious risk, so you probably don't need to live in constant fear, HOWEVER people with immune problems and the elderly are at risk so we need to take precautions for their sake.
I know that's not a simple answer, but I'm afraid Science is sometimes not simple. It does mean that when you hear all the scary stuff on the news, you personally don't need to be fretting too much. But turning a blind eye and shrugging the whole thing off is not the way to go either. It's better to err on the side of caution when it comes to something like this because even if you aren't at risk yourself, other people around you could be.
Quick and Important Coronavirus Facts...
How Is It Transmitted: We think it's mostly transmitted via what are called "respiratory droplets" which basically means moisture from your lungs. Coughing, sneezing etc. the same as most respiratory infections.
How to Keep Safe: The same thing you would do in regard to any viral outbreak. Don't be around people who are coughing and sneezing all over the place, wash your hands with 60-95% alcohol based hand sanitiser or if this isn't an option for you (religious reasons might prevent you for instance) wash your hands regularly with warm water and soap for about 20 seconds minimum - that's the time it takes to sing Happy Birthday twice. Also, if you see people coughing and sneezing openly rather than into a tissue they dispose of etc....politely call them out on it. We're all in this together and we really can slow it down.
Face Masks: Wearing a face mask doesn't do much to protect you I'm afraid. However if you've got Coronavirus, wearing one will help stop you spreading it to other people. This sounds a bit of a contradiction but it's because if you're coughing and sneezing, the mask will keep most of those droplets inside, but if it's already out in the air, the mask won't protect you from breathing it in. They also do have the slight advantage of stopping you from touching your own mouth. There are specially designed respirators called N95s which can protect you, but right now they are being given to healthcare professionals on Coronavirus wards...which seems pretty fair.
Can Children Get It?: Yes, as far as we can tell they are just as likely to catch the virus as anyone else. They don't seem to be at risk of symptoms however and there aren't any deaths reported for under tens anywhere in the world, but they can carry the disease and spread it.
What About Pets? This one is unclear. There are a few stories of people's dogs getting it in China but I'm afraid it's hard to know how transmissible it is.
I heard it was designed artificially in a lab by the government as a secret population control device: This isn't the website you're looking for.
In all likelihood, things are going to get worse before they get better. That's the way viral outbreaks always happen though. Because Coronavirus has a high-ish R0 value and in many people the symptoms are too mild for them to realise they need to self-isolate etc. it will spread fast.
So what happens next? Well, there are a few possible outcomes and it all depends on how we and our governments respond to the threat. The worst case scenario is that if we get to the point where 50% of the population contract it, half the world will all develop a natural immunity. Once that happens, the virus will slow down because there will be less people to infect and the R0 will drop. If the virus goes unchecked and we never develop a treatment this is what will ultimately happen. We'll develop a herd immunity and the virus will become endemic - but not after several million people die.
Slightly more optimistic is that the virus will mutate to the point of becoming less dangerous. This sounds counterintuitive but viruses are sort of self-defeating sometimes. If they're super virulent (I know it seems like I'm making a pun there, but the adjective happens to stem from the thing I'm talking about) then they can kill the host, but if they kill the host the virus can't keep spreading. That means ironically, the more deadly a virus is, usually the quicker it kills itself off.
If we're extremely lucky, it's possible that when the summer rolls around the virus will slow down. You might have heard Donald Trump saying the Coronavirus would die off when the weather got warmer and actually, he's not wrong - that really could happen. Some viruses don't transmit as well in warmer, dryer conditions and become seasonal, like the flu. However, there currently isn't any indication of whether Coronavirus will do that or not. It could just as easily keep going through the summer right on through. But if it does slow down, that will buy us time to develop a much-needed vaccine or anti-viral medication.
Ultimately, Science Will Win
One thing keeps coming up again and again when you read about Coronavirus, which is a comparison to other pandemics of the past. And the important thing is that we keep winning. You don't hear much from polio these days, or leprosy, or bubonic plague. But all those diseases still exist. It's just that we've become so darn good at science-ing that they don't get a foothold any more. The last time we faced a pandemic that could kill people like this it was Spanish flu, and that was a hundred years ago. This time we're armed with knowledge of DNA, techniques like CRISPR and the blessed internet to share information across the globe.
Every day, Science is in a stronger position than it was the day before because knowledge only increases. It's like entropy - the value can go up, never down. We have literally never been in a better position to handle and combat a viral outbreak. Every new case adds data to our understanding and there are legions of Biologists accross the planet working round the clock to develop a vaccine or a medicine that will stamp it out.
Yes, it presents a problem and yes there could be rough times ahead and, yes, there will be more deaths. But Coronavirus will not bring about the apocalypse.
The three books I've written all finish with the same sentence. It's also the sentence I have on my homepage. I feel like it's important to remember now more than ever something very important:
Science will save our species
Infection map: BBC
Head in sand: Virgin
Obi Wan: Star Wars
The Only Way is Ethics
When I was a wee young lad the debate over meat-eating was about the morality of whether it's OK to kill other animals for food. It’s an important issue and naturally leads to numerous follow-on discussions e.g. animal testing, distinctions between humans and other animals, what constitutes consciousness etc. etc. These are some spicy questions (#foodpun) so naturally it becomes anarchy when people discuss it on the internet.
In recent years, the discussion has shifted into the realm of science, incorporating the dietary effects of meat-eating and the impact of widespread livestock farming on an already strained environment. Moving from philosophy to science lands it squarely on my doorstep, so I’ve decided to tuck in (#foodpun) and try to pull some facts out of the quagmire.
Currently, 8% of the world is vegetarian and a smaller minority - around 0.5% - identifies as vegan. There’s a bit of disagreement over whether vegan simply means “plants-only diet” or if it means a lifestyle which excludes any form of animal exploitation. For this blog, I’m going to use the former definition because I’m focusing on biochemistry and environmental science rather than applied ethics. Sorry if that's not how you use the term.
I should also warn my readers that wherever you sit on this extremely important debate, there will be one or two things in the blog which will probably make you uncomfortable. My aim, as always, is not to espouse a particular belief but to present the facts as best I can. If you read things you don’t like then don’t worry, so did I. Hopefully I'll be able to present it objectively and you won't even be able to tell what my personal feelings are.
A Matter of Taste (#foodpun)
In my previous blog, I talked about the controversial art of IQ testing and the difficulty you run into when trying to make up your mind about it. The problem is that there’s so much evidence both for and against - not to mention a bunch of misinformation, pseudoscience and confusing Netflix documentaries - that it's hard to extract a clear answer. Unfortunately, the same is true of veganism. But first, let’s address some crucial misconceptions about food.
You probably got taught in school that there are five or six “food groups”, usually depicted in a colourful pyramid or a non-threatening pie chart. The idea of food groups was devised in 1972 by Sweden’s National Board of Health and Welfare to combat dietary shortages across the country. To avoid widespread malnutrition, the Swedish government wanted to make a simple guide advising people on what to eat. It’s a noble idea but it suffers from two big problems 1) you can’t simplify dietary science because it’s freaking complicated and 2) they don’t seem to have based their suggestions on any in-depth clinical trials whatsoever.
To make things worse, there’s a fair amount of evidence that in America the USDA’s version was heavily influenced by lobbying groups representing companies within the food industry to make certain foods more of a priority than others. So although the idea of food groups is a good one, I’d take it with a pinch of salt. #foodpun
When the standard food groups are listed, they usually lump each type of meal into one category, rather than reflecting the complex reality that most foods contain a mixture of nutrients. Meat, for instance, is usually listed as a protein despite containing lots of vitamins, while vegetables are usually put in the vitamin category despite containing lots of protein. Then there's fiddly stuff like the fact that some nutrients can be classified in more than one category and even be converted into each other.
As if that weren't complicated enough, there are 7.5 billion human metabolisms out there and we don't know a great deal about how they work (like the fact that gum disease links to Alzheimer's…what’s that about???) Human biology, especially the study of food, is so complicated that it’s difficult to make any absolute claims, which means there is no such thing as an indisputable food “fact” other than the obvious one...we need it to not die.
All of the conclusions we have drawn about human diet are statistical likelihoods which differ from person to person, meaning you have to be very discerning with what you accept. What works for one body might not work for another.
Myth: Vegans don’t get protein.
This is completely wrong, but it's hardly surprising that people have this misconception based on the food-group model. Actually, plants contain a ton of protein and a vegan diet gives you everything you need to build muscle mass. Just ask nature’s most dedicated vegans - gorillas.
To say your body needs meat is not really accurate. But it’s also not accurate to say your body needs fruit and veg either (sorry moms of the world). What you really need are the chemicals the foods contain and as long as you’re getting them from somewhere, your body doesn’t seem to be all that picky.
That being said of course, living on a diet which is too narrow does have knock-on effects. For instance, a lot of communities in the Arctic circle live in a region where growing crops isn’t possible so their diet is exclusively carnivorous - consisting of caribou, fish, seal, rabbit, birds and eggs. Or consider the Maasai tribesmen of Africa who subsist on a diet of meat, milk and blood (with a bit of maize thrown in).
These peoples are clearly not extinct and have been living on a meat-only diet for generations. But, as you might expect, this isn’t the healthiest way to human. You’ll find a bunch of literature on anti-vegan websites citing studies by anthropologists like V. Stefansson and G. Mann claiming the Inuit and Maasai are in perfect health (Mann even claimed the Maasai had immunity to certain diseases). However, this research was invariably drawn from small sample-groups, anecdote rather than evidence and included a lot of vague and untestable statements.
Later and more rigorous studies carried out by Nestel (1986) Bjerregaard (2003) and actually Mann himself, found that an exclusively carnivorous diet leads to a higher chance of heart disease, bone disease and...wait for it...symptoms of malnutrition. Shocker. So while it is true that a meat-heavy diet technically has all the nutrients you need to stay alive, it doesn’t do you any favours.
But Isn't Our Body “Built” to Eat Meat?
The answer to this question is a pretty clear ‘yes’ and there's a bunch of evidence to back it up. For instance, carnivorous mammals have small fat cells in their adipose tissue (for metabolic reasons I won’t go into) while herbivores have much larger fat cells. This means you can get a pretty good reading on how a species' diet evolved by looking at their fat tissue, and ours is much closer to that of omnivorous mammals than herbivorous ones.
Then take stomach acidity. Carnivores need to have way more acidic stomachs in order to digest the bacteria found in meat. Human stomach acid is significantly more concentrated than that of herbivores (by a factor of around ten) lining up neatly with omnivores.
Then probably the strongest bit of evidence: our body is not capable of synthesising certain nutrients like vitamin B12, despite needing them to live. Today, vegans have to take supplements or eat fortified foods to stay healthy - a practice not available to early hominids so their source of B12 would have necessarily been meat.
So yes, humans did evolve eating meat. But (and this is important) that doesn’t mean we are biologically compelled to live the same way. I mean, if you want to play the “evolution built us like this...” game, I’d point out that we aren’t really built to walk upright and doing so is pretty disastrous for our backs. Yet we insist on doing so.
Evolution may have set us up a certain way but that doesn’t mean there’s a magical law of Darwinism which says we have to keep repeating it. Evolution doesn’t make creatures “better” or “optimal”, it just works with what it’s got and we can absolutely improve on its designs. I mean...we invented cosmetic surgery for precisely that reason.
However, to flip that point around we can just as easily make it an anti-vegan argument by saying evolution made us walk a certain way and when we deviated from that arrangement, it started causing problems from our backs - couldn’t meat-eating be the same? I mean, if evolution made us one way, deviating from that (even if it's an inconvenient design) could be bad news.
Switching to a vegan diet does lead to weight-loss and an increase in emotional well-being in the short term (that's widely reported and verified) but what happens in the long term is less clear. The question of what we are “built to do” is therefore a tad misleading. The question should really be: what happens to your body if you stop eating meat? And I’m afraid the answer is not a simple one.
Ah Shucks, This is Gonna Get Ugly Isn’t It…
Yes, I’m afraid so.
The Subtle and Downright Inconvenient Truth
People talk about health as if it’s a progress-bar in a videogame which goes up and down until it drops to zero and you die. In reality there are so many different aspects to health that sometimes (because evolution isn’t your friend) they contradict. For example, I knew someone as a young adult who had cancer. She was given a course of chemotherapy drugs which killed the cancer entirely. But at the same time, they shredded her immune system and she died from a viral infection. Were those drugs "good" for her health or "bad" for it? Without them she would have died of cancer but because of them she died of an infection.
Or imagine someone who smokes a couple of cigarettes a day but never eats fast-food or snacks and exercises regularly...compared to a non-smoker who sits on the couch all day and lives on a diet of chocolate and chips. Which of them is in better “health” the smoker or the non-smoker?
Health is not one thing and biology rarely works on absolute cause/effect. In physics you push a ball and it rolls with a certain momentum every time, but in biology the same chemical in the same person on two different days can have two different outcomes.
It isn’t difficult to find testimonials from people who got sick when they switched to a vegan diet, and vice versa: you can find plenty of convincing stories from people who went vegan and reported immediately feeling better. The problem is that both groups are telling the absolute truth, so the only way of getting hold of anything useful is to consider one of the most important devices in the science arsenal: a meta-analysis.
A meta-analysis is a study of studies in which a general consensus is arrived at by examining what all the research says and averaging it. They can take years to assemble because scientists writing them gather all the research they can from all over the world and evaluate the methodology of each study before drawing a conclusion.
When it comes to meat-eating, the biggest and most thorough meta-analysis I’m aware of is quite a recent one, published on 19th November 2019 by Bradley C Johnston and 20 other researchers (The Annals of Internal Medicine, Volume 171, Issue 10) in which they analysed studies of red meat and processed meat compared to cancer-mortality rates. Johnston’s meta-analysis covered 6.1 million test subjects, ranging in age from 3 to 77 going all the way back to 1904.
Furthermore, and quite critically, their study received absolutely no funding which means they didn’t have a financial incentive to uncover a specific outcome and did everything off their own back. What did they find?
Well, the only absolute conclusion they could sift from this staggering dataset was that limiting red meat intake by three meals per week would lead to seven less cancer deaths in every one thousand people, while limiting processed meat intake by the same amount would lead to eight less deaths for every thousand. Now, let me say that statistic in two different ways, just to show how easy it is to spin the data…
Pro-Meat Eating Spin:
Eating red or processed meat won’t even increase your chance of dying from cancer by 1%
Red and processed meat cause 70-80 million deaths a year
In the first instance I’ve taken the cancer deaths as a raw percentage which gives us 0.7% - the risk of meat sounds insignificant.
In the second instance I’ve taken the number of meat-cancer deaths and expressed them as a percentage of the global population. Suddenly meat sounds like a mass murderer.
But that’s just cancer. What about all the other diseases which have been linked to meat consumption? Well, again the picture is murky but one of the most thorough studies I know of is the one reported in the British Medical Journal 4th September 2009 by Tammy Tong, who examined a variety of health effects in over 40,000 people and found vegans were at lower risk of heart disease than omnivores, which seems to make sense. After all, Maasai tribesmen and Inuit communities have a higher chance of heart disease from eating loads of meat.
BUT (kick-in-the-head-time) vegans turn out to be at a higher risk of suffering a stroke, which means reducing your meat intake will improve your heart health but cutting it completely might put you at risk of a brain aneurysm. Subsequently, going vegan could be simultaneously safer and more dangerous, depending on what other factors there are in your body. If heart disease runs in your family you’re possibly better off limiting the red and processed meat, but if strokes run in your family going vegan could be putting you in harm's way.
Nature has seemingly presented us with a demonic trolley-problem in which we have to chose between our own health and the lives of other living things. What do we do when it's us or them? Do we decide that the allegedly smarter animal (us) deserves to live more than the allegedly dumber animal (livestock)? Where do we draw that line? How smart does an animal have to be before we decide not to kill it for our survival?
And that's just two diseases. There's a whole galaxy of studies out there which point in both directions on the meat-eating issue. Eating meat and going vegan both have benefits and risks, so I'm afraid Science is of no help there. My advice as far as biology goes would be to consult a qualified doctor, rather than going by what you’ve seen in a documentary or read in a YouTube comments section. The ethics is up to you. Sigh.
Hotter By The Minute
While the dietary science of veganism is nuanced, the climate science is a lot clearer. Farming livestock on the scale we currently do isn’t logical. For one thing, it’s not a very efficient use of land e.g. 7 kilograms of grass is needed to produce 1 kilogram of beef, so cattle-farms take up way more room than crop-farms feeding the same number of people would.
Another big problem is that to keep those animals healthy farmers have to use a lot of antibiotics. Like, a lot a lot. In fact, this is largely what’s behind the bacterial apocalypse we’re heading toward- 90% of antibiotics used in the world are actually given to livestock and it’s that which is leading to widespread bacterial immunity. So...that’s not great.
Then there’s the effect of livestock on climate change. The number varies depending on the study you read but somewhere between 15% and 30% of all greenhouse gas emissions come from farming animals. Half of that problem comes from the simple fact that animals tend to fart and burp indiscriminately. Yeah. That’s right. You heard me. Farting and burping is legitimately part of climate Science.
If you read the literature on this topic you’ll come across the polished phrase “enteric fermentation” but that’s ridiculous fancy talk. Animals fart and burp with abandon, kicking out huge quantities of methane all the live-long day from both ends and this is a major problem for absorbing heat in the atmosphere.
There’s some interesting research into changing livestock diets (notably by giving them more seaweed) which cuts most of the offending gases, but there’s still the fact that animals produce manure. A ton of it. There’s a joke I desperately wanted to put here about “a ton” of manure but it would have involved a curse word and I have to keep the blog PG. Darn it.
Besides all this bullcrap, there’s other issues like fertilisers needed for the grass, processing of the meat, transporting it etc. etc. and the science is pretty cut and dried…livestock farming is a major problem for climate change. Unless the cows learn to drive Teslas, of course, in which case problem solved.
So...what do we do?
Nobody has ever run this experiment (obviously) so all the information we have on global veganism comes from simulations, which can be difficult to get right because there are so many variables. For instance, if you buy a kilogram of chicken from a farm down the road that has less of an environmental impact than buying avocados shipped from South America. Local produce is always better, but some countries don’t have the climate to make crops, so importing is their only option.
There’s also the problem of topsoil which has to be rolled and tilled regularly for planting, which releases CO2 into the air. If we switched to crops humans can eat instead of feed for animals, we’d have to be rolling and tilling the soil more regularly (just by the nature of what plants we can digest) which has its own greenhouse gas cost, offsetting some of the savings we’d make.
However, all the models I’ve seen come to the same conclusion even with these compounding factors: if we switched to vegan diets we would cut a significant chunk of our greenhouse gas emissions. Would it solve the climate problem? No. But would it buy us a few more decades? Yes. And frankly, when it comes to the end of the world, I figure we should consider taking every chance we can get.
Going vegan is also a lot easier to do than cutting energy or transportation needs. Our homes need heating and our kids need to be driven to school so that's not easy to get rid of...but changing our diet is quite simple. Just buy less meat.
What if the World Went Vegan Overnight?
Now, before we all go rushing out to buy Linda McCartney sausages and whatever the hell kale is, there’s a few things to consider. All the simulations we have, work by comparing the current world to one in which everybody is already vegan. There are very few studies looking at the transition period and if we don’t handle that carefully it could be catastrophic.
Suppose we switched to vegan diets in a single month. What would we do with all the animals? There are two options. Either we turn them loose and 99.9% quickly die of starvation, so we suddenly have billions of animal carcasses rotting everywhere leading to a bloom of fungus which is like detonating a carbon dioxide bomb in the atmosphere...something we sort of want to avoid in environmental terms. Not to mention, forcing these animals to starve in agony might arguably be worse than the bolt-gun of a slaughterhouse.
The alternative would be to keep all those animals where they are and turn the farms into preserves. The problem with that is that we’d be using the same amount of land for animals and their feed plus crops to feed ourselves, so we’d actually end up with less land available for a while.
If we had done it two hundred years ago things would have been fine, but our ecosystem would be in trouble if we switched too quickly now. The answer is therefore to do it slowly. A few more people every year buying less meat will send messages to the food industry that there’s less of a demand, which will make them shift their practices. They’ll stop artificially inseminating the animals they have and their animals will die in stages. The answer isn’t to get everyone vegan in a flash, it’s to do it over a few decades.
Are There Environmental Problems With Dropping to Zero Meat?
There are two potential complications we need to be aware of if we switch to veganism globally, one of which is blight. It’s not a widely discussed statistic but around 40% of Earth's crops die every year due to it. A particularly virulent strain can spread through a farm and cripple it within weeks but at the moment it doesn’t cause much of a problem because if crop yields are down, people can supplement their diet with meat. But if crops are the only things we’re eating, a bad year of blight would give us the Irish potato famine on a planetary scale.
Switching to zero meat globally is putting our food supply in a narrow basket and the risks of that need to be planned for. I'm not saying abandon the plan and stick to livestock...just saying we need to factor in the risks. I mean, that’s the whole premise of the movie Interstellar - a blight hits the world and we lose most of our crops, leading to dust-storms and the collapse of civilization. That could really happen and things got so bad in the movie we had to resort to asking Matthew McConaughey for help. This is Matthew McConaughey…
The other problem with switching to zero meat globally is that it doesn’t work for economic reasons I don’t pretend to understand. I've had a few people try to explain the gist of it to me and here’s what I *think* the central idea is: there are places on Earth where it’s not practical to farm crops, so keeping animals is sometimes a better solution because they are the best way of converting nutrients from the soil into a form humans can digest.
Take some of the mountainous regions of West Asia for instance, where you can’t grow grains in the poor-quality soil, but you can farm goats who survive on the tough grass which grows there. In the West, most of the commercial meat comes from faceless and heartless corporations, but in Africa and central Asia a lot of the meat comes from small-scale farmers trying to make it through the winter with their family intact. If everyone went vegan, those farmers, along with their children, have no economic security and starve.
A Flexitarian Future?
The ethical debate around meat-eating isn't as simple as "cruelty to animals is wrong so we shouldn't eat meat". That's not the part anyone disagrees with...at least I don't think it is? Most meat-eaters I've conversed with on the topic don't like cruelty to animals one bit. The real problem, the one that's much harder to solve, is that certain economic and biochemical principles seem to say that if people want to stay alive and healthy, they stand a better chance of doing so at the expense of other animals. That's what the argument is really about.
Also, just to address the elephant in the checking account, a vegan diet is currently more expensive than a meat-eating diet and some people don’t have the money to afford the luxury. Yes, the more people who switch to veganism the lower the price will be in future...but we aren’t there yet. So if you’re privileged and wealthy enough to afford a vegan lifestyle that’s awesome and you’re helping do your bit for the world, but for some people buying cheap meat is the only way to keep their children healthy and I'm not sure you can really criticise them for that.
We do need to cut livestock farming drastically, but I will concede that dropping to zero-meat comes with its own problems - environmental, economic and ethical. The answer may not be a global “no meat” policy therefore but a more achievable and realistic “less meat” one. It's not a perfect solution, but nature hasn't given us a perfectly solvable problem, so we gotta do the best we can.
The safest thing to do, both for the environment and our health, might be to gradually and cautiously move toward a diet which has less meat in it, while recognising that not everybody can or should go fully vegan. That's a difficult message for both sides to swallow (#...ummm...foodpun??? Yeah, I'm not in the mood anymore either). For meat-eaters, it's time to recognise that the world needs vegans and lots of them. For vegans, it's important to recognise that everyone going vegan probably isn't the best way to do things either. Which leads to my final point.
Don’t Be Jerks To Each Other
Meat-eaters: don't be jerks to vegans. Don’t mock them for their views, don’t make the whole “but how can you live without bacon?” joke, don’t deliberately eat steak in front of them (like Fox news reporter Jesse Waters did live on air during an interview with a vegetarian writer) and certainly don’t spend hours justifying why you do eat meat - that just makes you seem insecure and defensive. Frankly, the world needs all the vegans it can get, so if people have made the choice to eliminate meat from their diet you should probably be thanking them.
Vegans: don't be jerks to meat-eaters. I knew a vegan once who said meat eating was worse than the holocaust because, according to him, on sheer numbers it's a bigger extermination of living beings. Some readers might agree with that statement but even if you do...what do you hope to gain by telling meat eaters they're worse than Nazis? Do you really think that's going to help them change their minds? Some people eat meat because it’s healthier for them and cheaper for their families and I’m not sure you have the right to tell them to compromise their health (or the health of their children) for your moral values, no matter how strongly you hold them.
There aren’t any easy answers to some of these questions and often people come to a decision on meat-eating with trepidation and unease. I know I did. But if animal suffering is something we want to avoid (I think most people can agree on that, omnivores and vegans alike) let’s try to treat other human animals with compassion too. It’s a start, right?
The Book That Never Was
Over the years I've hopped back and forth on the issue of IQ tests. They get used in school admissions, job applications, criminal trials, military recruitment and performance management cycles but there seems to be great disagreement over whether they're actually telling us anything. The problem is that so much has been written about them (for and against) that the waters of debate are pretty muddy and it's not easy to know what the deal is.
Some books condemn the whole concept and argue that IQ tests only tell us how well people do on IQ tests (The Mismeasure of Man by Stephen J Gould, IQ: A Smart History of a Failed Idea by Stephen Murdoch, The Sun Shines Bright by Isaac Asimov) while others argue that IQ tests are useful but get nervously dismissed because they raise uncomfortable results people would rather ignore (What Is Intelligence? by James Flynn, Looking Down on Human Intelligence by Ian J Deary, The Neuroscience of Intelligence by Richard J Haier).
A while back, I decided I wanted to write a book of my own on the topic and present readers with a non-biased summary of what IQ research has actually uncovered. I approached my publisher with an idea for a book called The Science of Clever and although they were interested, it soon became obvious to me that it was going to end up a mess. The consensus on IQ testing is not cut and dried and you can't spend 50,000 words shrugging your shoulders and saying "Ummm...I dunno".
The study of intelligence research is called "psychometrics" (which sounds like a Transformers villain) and although I couldn't quite turn the whole field into a single light-hearted book, I still ended up with a bunch of interesting research, not to mention a half-finished manuscript on my hard-drive. So, I figured I might as well summarise the surprising highlights in my first blog of 2020. I doubt The Science of Clever will happen, but if it does, you're getting the first couple of chapters for free. Merry Christmas guys!
What Is An IQ Score?
First thing's first: there is no such thing as a standard or internationally recognised IQ score. IQ tests are actually products sold by private companies and there are dozens of brands available, none of which line up. For instance an IQ of 130 on The Culture Fair IQ Test is equivalent to a score of 150 on The Cattell III-B IQ Test and so on. If someone claims to have an IQ of whatever that doesn't actually mean anything unless they specify which company's test they scored it on.
The two most commonly used versions are the Wechsler Adult Intelligence Scale Version 4 (WAIS-IV) sold by Pearson Assessment for $980, and the Raven's Progressive Matrices Test sold by Hogrefe Ltd for $200, although you can't just purchase the tests from amazon as a private citizen. They are only sold to professional psychologists who have to agree to keep the materials under lock and key and never publish the contents.
From a cynical point of view, keeping the tests secret allows these businesses to continue making profit because a psychologist can't just download them from the internet. From a scientific point of view, however, keeping the contents secret means the results are more useful because subjects can't cheat by looking up questions.
The WAIS-IV takes about two hours and is administered individually (in private) with a psychologist holding a stop-watch, timing you on questions they ask. The Raven's test is a booklet of pattern-recognition questions you fill in against the clock like any exam. Both tests arrange questions in order of increasing difficulty and the further you get, the more value the questions have.
Your score is then ranked against other people and expressed as a comparison of where you come in the overall population. This is actually quite important because it means an IQ score is not an absolute number - it's a "quotient" i.e. a ranking of where you fit in a group. A good analogy is to think of it like a race in which you compete against other runners and measure your position rather than your raw speed.
How the group gets selected is very important for the results to be reliable. For instance, if you come third in a race of 100 professional sprinters that's impressive. If you come third in a race of only three people and the other two were on crutches, that's less so. The trick to getting a reliable quotient is therefore to make sure you're grouped with people of a similar type. IQ tests do this by age. Nothing else.
You probably assume, like I did, that psychologists have a) a good reason for grouping people by age and b) that the questions on the test are carefully arranged to distinguish easy from difficult. But you'd be wrong. IQ tests are unfortunately the result of historical convenience which tends to form the crux of anti-IQ arguments. They aren't based on any theory whatsoever.
The Worrying Origins of IQ
The first intelligence test was composed by the French psychologists Alfred Binet and Theodore Simon who asked local schools to provide them with a sample of "normal" boys to see what a child should be able to do. This is a problem because the baseline of normal was decided by teacher opinion rather than actual data...but that's all Binet and Simon needed; their test was a tool to help schools decide which boys were developmentally behind others. The problem came when other psychologists took the test and stretched it beyond what it was designed for.
The American psychologist Henry Goddard got hold of the Binet-Simon test and began administering it to thousands of American children (male and female) without checking to see what they could already do. Thus, if a child couldn't do what a small group of suburban French boys could, they were deemed below average.
After Goddard's test, a physician named Howard Knox wrote an adult version of the test to assess the intelligence of immigrants coming to America via Ellis island. Knox seems to have composed his questions out of thin air assuming that a "normal" adult should be able to do whatever he personally felt they should.
Following on from Knox, the Stanford psychologist Lewis Terman published his own supposedly more sophisticated version in 1916, again making-up questions based on his own personal feelings about what the average person should be able to do. Unfortunately, Terman was a noted eugenecist and racist so his test questions were based on information common to white middle-class America that black immigrants couldn't possibly be expected to know. Then, in some astonishing and offensive circular reasoning, Terman pointed to the fact that black immigrants didn't perform well on his test as proof that they worked.
Along with his student, Arthur Otis, Terman also introduced the idea of expressing results as a quotient based on the assumption that results should fit a bell-curve for a given age group. But here's the wacky thing...Terman never actually tested that assumption and nobody has since. The whole basis of calculating IQ score comes from an idea some guy basically made up!
The problem we now face is that it's unclear whether IQ test companies have actually rectified the problem because they can't publish data on how the tests are written. For example, if they published data that showed a certain type of question was harder, people could easily practice that kind of question, score higher on the test and artificially distort the results. The only way to assess whether the assumptions of IQ tests are correct would be to study them openly...which would immediately invalidate the tests themselves. A catch-22 of epic proportion!
So, does this mean IQ tests are useless ? Well, not quite. Critics of IQ tests have every right to point out that there are a wealth unfounded assumptions which go into them but, and this is important, it doesn't matter how a theory is arrived at or how sloppy the original scientists were. If a theory works, it works.
Fritz Haber was practically a war criminal but we still use his ammonia reaction to make fertiliser, Alexander Fleming discovered pencilin because he was a clumsy lab chemist who sneezed into a petri dish, but we still prescribe it for infections. Terman and the rest may have been irresponsible, even downright racist in their methodology, but we shouldn't evaluate IQ tests based on how awful the inventors were. We have to look at the data. And, against all the odds, IQ tests actually do sort of work. A bit. Sometimes. Vaguely.
By the mid 1930s, the main debate over intelligence was whether there really was such a thing. According to some psychologists, there was a single characteristic of the brain called g for general intelligence which fed down into all the different types of skill - memory, puzzle solving, pattern-recognition etc. According to others there was no such thing and people were simply good at different stuff.
One of the biggest surprises in the history of psychology came when a young student named David Wechsler settled the debate in another gob-smackingly lazy bit of science which accidentally revealed a valid result.
Wechsler had studied under many different psychologists who all had their own view of how to measure intelligence. Wechsler decided, in 1939, that the best thing to do would be to stick all the tests together and create one super-test. If g really did exist and intelligence was one thing, people who did well on one test would do well on all the others. The result was the aforementioned WAIS; a battery of thirteen sub-tests as follows...
1) Vocabulary and definitions (e.g. what does vulnerable mean?)
2) Similarity spotting (e.g. what is the link between a fork and a knife?)
3) General Knowledge
4) Comprehension (e.g. why do people put food in a fridge?)
5) Spot the missing shape in a series
6) Pattern recreation (you are given coloured blocks and have to recreate images)
7) Picture arrangement (you are given a series of pictures and have to put them in logical order)
8) Matrix puzzles (you are given a grid of shapes which follow a pattern and you need to spot it)
9) Arithmetic questions
10) Repeating sequences of numbers from memory
11) Putting strings of letters and numbers in a given order
12) Code breaking (you have to decipher a message using a table of values)
13) Finding given symbols in a grid of random ones
Wechsler himself believed there was no such thing as general intelligence and people simply had talents and preferences. The idea of a single number to reflect some underlying factor was ridiculous because how could one number reflect your whole ability? But, to his surprise, it turned out that there really is something there. People who do well on one WAIS test end up doing well on all of them...by similar amounts.
The largest survey to investigate the existence of g was carried out in 1997 by The Psychological Corporation who looked at breakdowns of the WAIS-III test, analysing 2450 Americans from 28 different cities ranging in age from 16 to 89. Given the 13 components in the WAIS-III there are a possible 78 relationships between sub-tests and every single one of them has a positive correlation. Which shouldn't have happened. Wechsler's test was cobbled together like Frankenstein's monster and yet somehow yields the inescapable result that there really is some unifying brain-feature which translates to a variety of mental skills.
The strength of a correlation can be expressed as a percentage where 0% means "no relationship" and 100% means "perfect relationship". A value of something like 20% means there is a weak relationship between the two variables while a value of 80% means there is a strong one. For the WAIS-III the average correlation across the 78 comparisons was a remarkable 50%. The strongest was 80% (between vocabulary and general knowledge) while the weakest was 30% (between number-sequence tasks and missing shape tasks).
A very important caveat is that g does not mean the same as the everyday word "intelligence". It refers to a currently unidentified cognitive feature and when we talk about intelligence there are other factors such as creativity and wisdom to consider...but g is a part of it. My personal feeling is that a correlation of 50% is still too vague for a score to be expressed as a single number, so I think an "IQ range" would be more useful, but the fact is g apparently exists and the WAIS IQ Test goes some way toward measuring it.
What Does It Tell Us?
So far all we've shown is that a single IQ score is a moderately reasonable way of measuring something inside the brain. But does it actually translate to the real world or is it just a number which tells you how well you're likely to do on other tests? Well, there are a few characteristics which an IQ score does seem to predict. I've picked a few example studies to show the most agreed-upon findings and although different studies disagree on the strengths of the correlation, the ones I've picked are fairly representative. It would appear that IQ can partly predict...
School Performance - 2015 study by Frank Spinath analysing over 105,000 students comparing IQ score with school performance and grades. They found a correlation of 54%. That's quite an important finding for me as a teacher. It means that while IQ plays a factor in how well a student does, it's only half the story. Optimistically, this means if you have a low IQ you are not destined to do badly in school although conversely if you have a high IQ you are not guaranteed straight A's either. Other factors like work-ethic, effort, teaching quality and probably a bit of luck will play into it as well. IQ is half the story of how well people typically do in school.
Income as an Adult - 2007 study by Tarmo Strenze analysed over 29,000 people comparing IQ score with income. Strenze found a 23% correlation which means there is a loose relationship but it's not everything. IQ can contribute a little bit to how much you'll earn as an adult but it's one of many factors.
Crime and Violence - 2013 study by Predesco of crime and IQ statistics of a dozen European countries found correlations of violence 50%, homicide 37%, motor-theft 39%, burglary 30% and nothing for robbery (6%). People convicted of crimes, especially violent ones, are more likely to have low IQs.
The P300 - 1998 study by Diaz found a correlation of 44% between IQ score and what's called the P300 value. This one is tantalising because your P300 value is a measure of neuron speed. It measures how quickly after a stimulus your brain waves change and on average, human neuron response-time is 300 milliseconds (hence the number) but people with higher IQs tend to be a few milliseconds faster. People with higher IQ scores are, on average, slightly faster in neuron response speed. Important note: This study sample was a lot smaller than the others but its result is too intriguing to not mention.
Weirder Stuff: IQ correlations have been shown between a few other unexpected personal characteristics. I won't go into much detail but the studies are out there if you want to go looking. IQ correlates positively with...
a) Being a fan of dark humour
b) Enjoying puns
c) Having been breastfed as a child
Because IQ is a slightly fuzzy measurement of a slightly fuzzy concept, it's possible to pull all sorts of correlations out of the data, some of which are subtle or misleading. It's widely accepted for instance that the tests are very dependent on culture and upbringing (after all, the first few sub-tests on the WAIS-IV are about things like general knowledge and vocabulary which are very environmentally shaped).
Sometimes this can be geographic e.g. children raised in Asian cultures perform, on average, slightly better than children raised in American cultures. This isn't really surprising given that the two cultures are vastly different, but it leads to the unfortunate misconception that "race" affects IQ. In fact, when you correct for environment, culture and upbringing, these differences vanish and people of all races do just as well on IQ tests.
But there are a few harder to explain quirks which come out. For instance, IQ scores negatively correlate with SAT scores i.e. people who do well on IQ tests are likely to do worse on their SATs...which is the exact opposite of what you'd expect. Another really weird correlation is that left-handed people tend to perform a few IQ points higher than right handed. Maybe because they live in a world which requires a bit of extra focus and puzzle-solving to do basic tasks (all the tools and equipment of the world are geared for right-handers) so perhaps their brains are just a teensy bit sharper and more practised?
Another interesting finding is that people's IQ tends to decrease during adolescence but then increase with old age i.e. a child with an IQ of 140 at the age of 9 might drop to an IQ of 110 by the time they're 22, but then go back up to 140 by their 40s. Contrary to popular myth, older people actually have higher IQs than younger people. Nobody has a clue why that's happening.
More baffling, and probably one of the most heated debates in the psychological community, is the "Flynn effect" discovered by James Flynn: the undeniable fact that the global average IQ scores are going up and not by a small amount. Flynn, who is not anti-IQ testing as has been reported, discovered that every generation performs significantly better on IQ tests than their parents did at the same age. So although your parents might have a higher IQ than you, you're probably smarter than they were at your age. But why is this happening??? Is modern culture preparing people to do better on the tests? Is it a change in diet? Are smarter people breeding more? We don't have a clue but the fact is there: IQ scores are going up.
There are also fascinating correlations between IQ and voting habits, religious practices and this is part of what makes IQ such a hotly debated topic. There currently isn't an accepted theory of what IQ even is, so it's up for grabs and nobody's exactly sure what's baby and what's bath-water.
The Young Science
Psychology is a new science and it's finding its feet. IQ tests are one of its first major contributions and, naturally, they're going to be a bit clunky. But, I ask you fellow scientists, were physics, biology and chemistry so different once?
Mendel's theory of genetics was a simplistic way to explain variation but it has a few nuggets of truth in it and pointed us in the right direction. Bohr's early model of the atom was unrefined and misleading but it gave us a starting point and, again, pointed us in the right direction. Lavoisier's first periodic table muddled up compounds with elements but, once again, it pointed us in the right direction. Science doesn't usually jump straight to the right answer in one go, it makes casual stabs first and I motion that IQ testing is of a similar nature.
The tests are problematic, vague and unreliable I agree but the fact that they do predict a few things with accuracy means they are a step in the right direction. There is something to be learned from them, we just don't know what it is yet. Yes, we have to be cautious and recognise that it is not the final picutre or even close to it, but it's an approximate sketch that vaguely resembles what we're ultimately looking for. Trusting or disregarding IQ in its entirely seems unwise to me. Recognising it as the first feeble attempt at something which might eventually work...that seems more like the "intelligent" thing to do.
Happy New Year
The Nerdiest Guy In School
It's been a while since I've written a blog so firstly, apologies for that. I've been quite busy the last few weeks because I've been marking exam papers, working on my next book and enjoying the delights of an Ofsted inspection at my school. It's been a long while since I added to my "Favourite Bits of Science" series but I've finally got a minute to write...and eat...and sleep.
In the first installment I talked about my favourite people from science history. In the second, I discussed science popularisers I look up to and in this third chapter I'm going to write something esoteritc, self-indulgent and weird. I'm going to talk about my favourite "things" in science. Not people, not books, not TV shows, not facts...things. What kind of person writes a blog like that, you ask? Well, more to the point, what kind of person reads it?
Favourite Particle: The Charm Quark
In particle physics, there were originally thought to be three types of quark (correctly pronounced to rhyme with 'fork', no matter what anyone tells you). The three quarks were named up, down and strange by Murray Gell-Mann, and using them we could explain the behaviour of every atomic nucleus known to man. Those three particles are really all you need. But what's interesting is that the strange quark is effectively a down quark with additional mass - as if nature gave the down quark a fat older sister for some reason. Wouldn't it be a lot neater, therefore, if the up quark had a heavier counterpart too?
The physicist Sheldon Glashow certainly thought so and proposed that there was a fourth quark hiding somewhere in the quantum wilderness. This particle was not essential to our theories and wasn't needed to explain any observation, but it made things a bit more pretty, and thus Glashow named it the charmed quark, because its existence would be a charming feature of reality. His proposed particle was eventually discovered in 1974 and his sentimental optimism was justly rewarded.
The charm quark doesn't do anything especially different to the other three, but I love it because it reminds me of something important. You sometimes get the feeling studying physics that nature only does things by necessity and that the governing law of reality is cold, mechanical causality. The charm quark is a reminder that sometimes the Universe is pretty for no reason. The Universe doesn't have to have symmetrical neatness, and yet it does. The charm quark is a reminder that nature isn't only interesting...it's beautiful and that's worth celebrating too.
Favourite Element: Phosphorus
Phosphorus is the eccentric loner of the periodic table. The unappreciated genius capable of chemistry no other element would think of. It is the only atom to regularly form five bonds to others and it comes in a variety of natural states, which is also unusual. While most elements tend to show up in one state with one colour, Phosphorus can be found as brown, black, white, red, yellow, purple, blue and glow-in-the-dark.
Phosphorus is the element which forms the backbone of DNA and is the "limiting reagent" in the biological ecosystem, meaning the entire population of living things on Earth goes up and down in line with the amount of available Phosphorus. Not only is Phosphorus crucial to life however, it's also an important part of death - being the most toxic element on the periodic table and the basis of most chemical weapons.
All of these reasons would be enough to make it an element worth taking note of, but my love of Phosphorus actually stems from something simpler and far less sophisticated. I once accidentally set fire to a chunk of phosphorus during a reaction and, before I began choking on the toxic fumes, I caught a glimpse of it burning and it is one of the most beautiful reactions I have ever seen. A photograph or video does not do it justice because on film it looks like any normal fire. But if you see it in the flesh, the flames of burning phosphorus are unique. They are silvery-white and ripple across the surface of the element like waves on a pond, hugging it as if they don't want to rise into the air. Even when being destroyed, phosphorus is incomparable.
Favourite Chemical Compound: Ionic Liquids
There are generally three ways atoms can bond to each other, called ionic, covalent and metallic. I won't go into the technicals (if you're curious, check out my first book Elemental) but ionic bonding generally goes like this...two small, roughly spherical atoms or molecules stick to each other because of a charge difference. One molecule or atom is positive, the other is negative and when they pack together they form a rigid lattice, resulting in crystals, salts and rocks etc. because they are tiny, highly charged pellets of matter crammed together in stubborn arrangements. But there is one bizarre exception.
If, instead of tiny balls of charge, you have two molecules which are quite big and bulky, the positive and negative charges get spread out across the molecules. The result is that the charge-attraction gets diluted and when the molecules bind together, it's a weak attraction, meaning they don't form solid structures. They form liquids. Something which, prior to the 1930s, was thought to be impossible.
Ionic liquids have all the properties of salts and crystals, but also the properties of liquids. They tend to be thick gloopy substances, resembling honey or treacle, and they are usually colourless, yellow or orange. What's really interesting is that because the particles in the fluid are so loosely attracted to each other, they tumble at a very low rate, so anything dissolved in them also interacts very slowly. This means you have enough time for complicated reactions to take place and you can tailor your ionic liquid to the reaction you're trying to achieve.
Ionic liquids fascinate me because they are substances which shouldn't exist...and yet do. I also spent a whole year studying their behaviour (read more about that adventure here) and I think they're going to be one of the next big things in chemical research.
Favourite Equation: S = k log W
Sir Arthur Eddington once wrote "If your theory is found to be against the second law of thermodynamics I can offer you no hope; there is nothing for it but to collapse in deepest humiliation".
The second law of thermodynamics is one of the most worshiped principles in Science and works its way into everything from data analysis to evolutionary anthropology. It says, put simply as possible, that energy tends to spread over time. Things don't become ordered at random, they become disordered and you can't get energy to stay in one place. Everything from sugar poured on a kitchen table to the fabric of the cosmos itself spreads out, and we call this spread of energy "entropy", defined via the equation above.
It's a bit hard to talk it through without diagrams and sketches but here goes. Firstly, you take the number of possible ways energy can arrange itself, represented by the letter W (nobody knows why that letter was picked). Then you find what's called the logarithm of that number. That means: how many times do you have to multiply a number by itself to reach the value of W. It doesn't matter what number you pick to use (typically you use 10 or sometimes the number "e") but once you have that, you multiply it by "k" which is called Boltzmann's constant - a number which relates the energy of particles to how they are moving and the computed answer will give you the entropy of what you're looking at.
I love this equation because it's simple enough to write in a few letters and yet it has far-reaching implications. I once carved a giant version of the equation in the snow of my high school's back field (I'd like to think it's the largest snow-equation ever made) and when Ludwig Boltzmann, the man who came up with the concept of entropy, died, they put the equation on his tombstone. Which means I have a favourite tombstone as well...
A New Day Is Dawning
In part I of this series I revealed my all-time favourite figures from Scientific history and why I admire them so much. In part II, I've decided to talk about the art of Science communication itself and what I consider the finest examples of the craft. Both my jobs are essentially: "explain Science to people who don't know the Science," so obviously this is something I care about a great deal.
I started compiling the list last week, but as I went along I began to notice something rather surprising...all the stuff I've chosen was created in the last few years. Initially, this made me feel like an uncultured swine, but then I realised something pretty exciting. I've seen Sagan's Cosmos and Bronowski's The Ascent of Man. I've read Darwin's On The Origin of Species and Levi's The Periodic Table and while I don't want to dismiss these towering works, I'm going to say something a little bold...I think Science communication is better today than it ever has been.
It's possible to respect the classics of an art-form, while simultanesouly recognising that contemporary material can outshine it. What's wrong with saying you prefer Stephen King as a storyteller to Charles Dickens? Why can't we admit that Shakespeare wrote garbage (The Taming of the Shrew) as well as genius (A Midsummer Night's Dream)? And why can't we dare admit that maybe, just maybe, Next Generation is better than The Original Series?
Absolutely we should honour the trailblazers which came first, but that doesn't mean we can't improve on them. In fact, isn't that what's supposed to happen with time? Shouldn't we learn from the flaws of the past and do better today? Well, when it comes to Science communication I think we're doing just that.
There has never been a better time to be a Science geek because people are getting more educated about how things work and as literacy improves, so does the quality of explanation. Consider how in the 1950 movie Destination Moon, the main characters walk around the lunar surface without helmets because the general public simply weren't aware there was no air in space. Or how in Superman, Kal-El reverses time by spinning the Earth in the opposite direction because people weren't aware that...it wouldn't work. You couldn't get away with those errors in a movie today because people are more informed. We're smarter than we've ever been, so I'm not ashamed to say that I think the best Science communication is happening right now. Without further ado...
Favourite Science TV Series (Non-Fiction): Planet Earth II
Perhaps it's because I'm not a zoologist and therefore less familiar with the animal kingdom, but every sequence from 2016's Planet Earth II had my jaw on the floor. Narrated by the voice of quality itself, David Attenborough (who writes his own scripts incidentally), Planet Earth II presented the most startling footage of animals and their environments I've ever seen. While Attenborough's recent Netflix series Our Planet is also worth a watch, Planet Earth II has a more optimistic tone. Our Planet puts an emphasis on how much we're screwing the planet up - I mean in fairness, we are - but Planet Earth II reminds us why the planet is worth saving in the first place. Also, Our Planet has an insufferable credits song while Planet Earth II has a score by Hans Zimmer. Planet Earth II wins.
Favourite Science TV Series (Fiction...Sort Of): Chernobyl
A bit controversial as it's not strictly about Science, but I think 2019's Chernobyl is still worth mentioning. Currently ranked #4 on IMDb (Planet Earth II is #1 by the way), Chernobyl shows, in agonising and brutal detail, how the Chernobyl nuclear power plant disaster occurred and how Soviet Scientists worked to contain and understand the damage, clashing with the political obstructions of their culture. It's a fictionalised account of the real tragedy but it's drawn from transcripts, eyewitness statements and court documents, so while it's not exactly a perfect documentary, it's pretty damn impressive. I started watching it one evening at 7pm and found myself so gripped I binged the whole series in one go, finishing around midnight. It's depressing as hell (the fact it was written by Craig Mazin who wrote Scary Movie 3 is kind of astonishing) but if you can stomach the graphic violence, Chernobyl shows you what Scientific honesty looks like.
Favourite Science Book: Behave by Robert Sapolsky
Robert Sapolsky is probably my favourite living Science writer and his books have genuinely brought me to tears from laughter and sadness. Behave is not only his masterpiece, it is the finest thing he (or anyone else) has written about Scientific knowledge. Sapolsky draws on his expertise in anthropology, primatology, biology, neuroscience, psychology, sociology and philosophy to tackle the human condition itself and figure out why we are the way we are. While it's easy to dismiss difficult questions like "nature vs nurture?" Sapolsky doesn't shy away from them or pull his punches. He gets right down to the nitty-gritty of what we know about behaviour and what makes us act the way we do, covering everything from war to religion to economics to education. I have never felt any book should be compulsory reading because forcing a book on someone will make them hate it, but I might make an exception for Behave. If there was one book every lawmaker, leader, preacher and teacher should read...it's this. Oh, and obviously my book. Duh!
Favourite Science YouTube Channel (Non-Technical): Symphony of Science
This one is just plain old fun. Created by John Boswell, Symphony of Science is a series of music videos assembled from auto-tuned interviews with Scientists and documentary footage. It's kind of hard to describe (check out the one above) but if you want a distilled barrage of cool images set to funky techno-songs about Science, Boswell is your guy. While this series doesn't really educate or explain the facts as such, it encapsulates the fun and wonder of Science perfectly, as well as giving you tunes you'll be humming for days. Science can be playful as well as heavy and it's nice to remember that. Plus if you've ever wanted to hear Bertrand Russell rapping, look no further.
Favourite Science YouTube Channel (Technical): The Theoretical Minimum
So let's say you're wanting to get stuck into the complexities of how modern physics works. Let's say you aren't afraid of putting hours aside to dredge up your high-school math lessons and you want "just the facts ma'am". The guy you want to go see is Leonard Susskind, Richard Feynman's protege and probably the finest Physics lecturer out there. A few years ago, Susskind began a lecture series at Stanford University explaining Physics in full detail and stuck them online for anyone to watch. There's no frills or special effects, but by Thor's hammer, this guy knows his stuff. Be warned, it's "Physics with the hard stuff left in" and there isn't a whole lot of singing, but if you're wanting to be stretched, Susskind's raw approach is for you.
Onward to Optimism
In last week's blog, I talked about bits of Science I find challenging and how there's nothing to be ashamed of in getting stuck. We're all human and we all struggle (except for Michael Keaton who is too awesome to struggle with anything) so it's OK to ask for help when needed.
My aim in writing that piece was to encourage people to be open about their difficulties and not feel judged in admitting that sometimes they find stuff hard. It seems to have been a success and I want to say thank you to everyone who e-mailed me confessing to their own hated parts of Science. Nevertheless, I feel obligated to counteract the negativity of that essay and write something a bit more upbeat. What better way to do that, than to write about the bits of science I absolutely adore!
The challenge I faced this time was narrowing it down. There are so many things I want to talk about it wouldn't fit into one blog...so I decided to break it into several. I don't know how many parts there will (or when I'll find the time to write the rest) but I'm going to share my personal picks for the best bits of science ever. Is this going to be a tad self-indulgent? Probably. Sorry about that!
Favourite Scientist (Early) - Michael Faraday
Michael Faraday was the son of a poverty-stricken blacksmith and never got a chance to attend school. He routinely faced ridicule and scorn from wealthier echelons of 19th century English society for not being as well educated, but he was a determined investigator and a perpetual thinker who ended up having the last laugh when he invented the basis of pretty much all modern technology.
When the chemist Sir Humphry Davy (discoverer of seven elements) accidentally blasted his eyeballs apart during an experiment, Faraday was hired as his lab assistant and soon showed so much skill and intuition that Davy was prompted to declare Faraday his greatest discovery.
Faraday’s most significant contribution to Science was the theory of electromagnetism – the idea that electricity and magnetism are both facets of the same phenomenon and that we can manipulate or generate them given the right tools. The importance of this discovery is hard to over-sell. Pretty much every power station in the world runs on Faraday’s principle of inducing electrical current in a wire by spinning a nearby magnet, and almost all our communication techniques rely on controlling electromagnetic fields.
We have Faraday to thank for mains electricity, radio and television, mobile phones, wi-fi signals, infra-red remotes, X-rays, lasers and all of contemporary astronomy. For a guy who could barely do fractions, he more or less invented the modern age.
The main reason I admire him so much however, is not his profound discoveries but his personal character. Faraday believed in the work he was doing and did it purely for the good of mankind. He turned down the offer of a knighthood because he didn't believe in titles and he also refused to accept numerous financial rewards because he was not concerned with making money. He also started giving Science lectures twice a week to members of the public (free of charge) and permitted women and children to attend, because he wanted everyone to have the opportunities he had never been afforded.
Faraday believed in Science and he believed in the human capacity to understand it, no matter what a person's gender, race or age might be. As a Science teacher, I can't help but idolise the guy for that. Oh, and he invented party balloons. No, seriously, I'm not kidding. Faraday invented balloons!
Favourite Scientist (Modern) – Richard Feynman
Richard Phillips Feynman was in many ways at the other end of the spectrum to Michael Faraday. While Faraday was a dignified man of honour, Feynman was a charismatic rogue who delighted in pranks and parties (although, for the record, he thoroughly disliked alcohol and drug-use). While Faraday shunned glamour, Feynman swam in it - scooping a Nobel prize for physics, enjoying the “company” of countless women, and having red carpets laid out for him at weekly lectures.
Feynman was basically the Han Solo of physics, known more for his antics than his actual Science. That's not surprising mind you, given his specialism was quantum field theory, something I can't do justice to in a single paragraph. Although now's probably a good time to shamelessly plug my book on quantum physics.
The best I can do in a few sentences is say that Feynman was the first person to make quantum physics work properly. Before him, quantum physics was a disheveled array of facts and question marks which nobody had synthesised into a single idea. Feynman was the guy who achieved that, by establishing the basic principles everything else sprang from.
The reason I admire Feynman much however, is not for his caddish personality or even for his outstanding contributions to physics. It's because of the way he approached scientific problem-solving. All too often in Science you’re fed a bunch of equations and jargon-words which don’t actually get you any deeper to understanding what's going on. It’s tempting to build on the work of others, but Feynman preferred to do things differently and insisted on working everything out from first principles until he arrived at the same conclusion.
Feynman would start with a handful of easy to understand facts and extrapolate one step at a time, never introducing a new concept without picking it to pieces. He believed that the only way you could understand a phenomenon was to ignore all assumptions and work from the ground upward. Feynman's approach to knowledge is probably best summed up with this quotation of his: “If I can’t explain it to a freshman, that means I don’t really understand it.” For Feynman, the art to being a good scientist was to simplify things, not make them more complicated. Something which is forgotten all too often.
Favourite Scientist (who was really more of a mathematician) - Emmy Noether
There's a good chance you've heard of Faraday and Feynman; they're pretty well known figures in Science history. But not many people have heard of Emmy Noether and that's a shame because she was probably one of the five smartest people of the last hundred years. Oh and if you're wondering how to say her surname, it should rhyme with "murder" with a soft d. Actually, the only word I can think of which rhymes properly is the giant flaming demon-monster from Thor: Ragnarok...so if you've seen that film, you're on the right track.
Born in Germany at the end of the 19th Century, Amalie "Emmy" Noether faced a lot of prejudice throughout her life, partly down to being Jewish and partly down to having a uterus. Naturally she was treated like dirt at University, with numerous male members of staff requesting she be expelled for the crime of...I dunno...being a woman who's good at math I guess? She had to work unpaid in her role as lecturer, and had to advertise her talks under a man's name. But, just like Faraday, Noether was able to confound her doubters by coming up with one of the most important physics theorems in history: Noether's theorem.
Again, it's pretty hard to summarise Noether's theorem in a few sentences. The general gist goes something like this however: in every law of physics there are certain things which cannot change. For example, in thermodynamics we make the assumption that energy cannot be created or destroyed. In engineering and mechanics we find that it's momentum which stays constant. In particle physics it's something called lepton number and so on. What Noether's theorem does is predict which things can and cannot change for any law of physics. Or, putting it another way, it's the foundational law of physics that everything is built on.
Although technically more of a mathematician, Noether's contribution to theoretical physics is so profound it underpins everything from why neutrinos exist to where the Higgs boson comes from. Oh and as if that wasn't enough, Noether was the woman who helped Einstein figure out the mathematics of his theories of relativity when he got stuck. Just think about that. When Einstein got stuck, he asked Noether for help. Not even Michael Keaton can claim that.
Favourite Science Author – Isaac Asimov
My two jobs are talking about Science and writing about Science. So when I’m planning a lesson or lecture or when I'm sitting down to write an essay, the man I most aspire to emulate is Isaac Asimov. In a career spanning 52 years, Asimov managed to write or edit over 500 books, getting published in 9 of the 10 Dewey Decimal non-fiction book classifications. Asimov wrote histories of the Bible, analyses of Shakespeare, books of limericks, biographies of poets and critiques of politics, not to mention a somewhat phenomenal career as a science-fiction author. For me however, his greatest talent was writing about Science for non-experts.
With his wolf-man facial hair, Asimov was a professor of Biochemistry at Boston University and wrote thousands of short articles and essays explaining Science for the general public. Although some people find his acerbic self-agrandising sense of humour a little obnoxious, I always admired him as a teacher because of his guiding principle when it came to explaining things: “Be clear”.
Asimov wrote on every scientific topic imaginable, from the validity of IQ testing to the nuances of special relativity and at all times he insisted that as long as his explanations were clear, he was succeeding. He didn’t pepper his writing with flowery prose or philosophical asides (something I am often guilty of), he just stated the facts in a logical progression. So talented was Asimov, that other Scientists would challenge him to write articles on increasingly complicated and difficult-to-explain subjects, but Asimov always won because he knew something important: if you can say it with Science words, you can say it with regular words too.
Sometimes you read his work and think, “why didn’t I think of saying it like that? Ot’s really simple,” and that is the mark of a good teacher. Someone who can make even the most complicated ideas seem obvious. Frankly, he puts most other science authors to shame, myself very much included. Obviously, I know I will never be as good a writer as him...but you've got to have something to shoot for.
In 1999 the Canadian non-profit organisation Companies Committed to Kids ran a television campaign aimed at boosting children’s self-esteem with the slogan: “Nobody’s good at everything, but everybody’s good at something.” By contrast, Public Service Announcements in the UK are about wearing a seat-belt so you don’t kill your dad in a car crash. I mean, they’re both important messages but as a teacher I’m more interested in the first one. It’s rare that I crash a car inside my classroom but I frequently come across students doubting their ability to do STEM (Science Tech Engineering Maths).
That’s to be expected, of course. I mean, let’s be blunt about this…STEM is hard. There’s no such thing as an intellectually perfect person (with the obvious exceptions of Spock and Data from Star Trek) so naturally everyone struggles from time to time. In a perfect world there wouldn’t be any shame in admitting this, but for all sorts of reason we’re often reluctant to advertise our cognitive shortcomings, and this presents a real dilemma for educators.
As both a teacher and author I want to make sure my students/readers feel they can trust me to “know my stuff”. But at the same time, I want them to see me struggle so they don’t feel bad about running into difficulty themselves. If people perceive me as infallible they’re less likely to ask for my help because they’ll be worried about me judging them, but on the other hand if they see me as useless they won’t ask for help in the first place because they won’t believe I can provide it. How do you get that balance right?
I’ve been contemplating this question a lot over the past week with the start of a new academic term, when it struck me that the simplest thing to do would be write a public declaration of various bits of STEM I find difficult. I’m not one for subtlety (check the title of the blog) so, without further ado here’s a list of the top STEM areas you don’t want me teaching you. How's that for a Buzzfeed-worthy title?
Almost All of Biology
This one’s no secret to anyone who has seen me teach the subject. I know virtually nothing about animals, I’m not 100% sure what a chromosome is and I can’t tell you what the pancreas does (something to do with diabetes???). Biology has always been the weakest of the three natural sciences for me, and it's almost a running joke in my department that I'm not allowed to cover a Biology lesson.
It’s hard to pin down why I lost my way with Biology (my high school teacher was actually really good) but for some reason I got turned off to the subject as a teen. By the time I realised it was cool, I was a busy adult and could never find the opportunity to sit down and learn the basics.
On rare occasions when I do have to teach the subject, I read over the material the night before, follow a detailed lesson plan on my desk and by the following night I’ve typically forgotten everything I said. Really, students in my Biology classes might as well just read out-loud from the textbook…that’s more or less what I’m doing.
There are a few exceptions to this rule - I’m fairly well-versed on the brain, the biochemistry of medicines and drugs, and I know a disturbing amount about the composition of plant-matter - but other than that I’m typically worse than a rank amateur. I really wanted to put a Biology metaphor in there but I don't know any! That's the problem!
Basic Mental Arithmetic…that most children can do
I’ve got a tense working relationship with mathematics. The kind you have with a work colleague after you send an e-mail to everyone in the office mocking the shape of their ears, only to realise you accidentally copied them in as well.
I can use mathematics when necessary, but it’s not something I seek out. I only like it when I’m using it for chemistry or physics and if I go outside that comfort zone I’m immediately drowning in symbols. And, without a doubt, the area of maths I’m most clumsy with is basic mental arithmetic.
I’m serious here. I, a thirty one year old STEM teacher with a Master’s degree and a couple of bestselling books to my name, have difficulty doing simple sums in my head. I’ll muddle fractions, I’ll miss decimal places, I’ll get powers of ten in the wrong order and I can’t even sum a series of two digit numbers without writing them down first. I can never split the bill in a restaurant, I am lousy at calculating percentages and I can genuinely see myself getting hauled in front of a judge some day for tax fraud because I’ve accidentally forgotten to carry the one or something.
This can be quite embarrassing in front of a class when I’m struggling to work out 107 - 9 in my head, but there it is. I can explain all four of the Maxwell equations at the drop of a hat, but ask me to work out 60% of 50 and I’m going to need a minute.
There is a mental condition called dyscalculia which is a bit like dyslexia for numbers. I have no idea if I’ve got it (I wouldn’t be surprised) but either way, it doesn’t seem to be something I can avoid. That’s actually one of the reasons I respect people who work in retail. I’ve got no clue how to count my own change, let alone someone else’s.
I’d like to claim this one is just a “fiddly topic” everyone struggles with, but the whole point of this blog is that different people struggle with different things, so I can’t let myself off easy by saying everyone finds this topic hard. But...for the record…they totally do.
Fluid mechanics is the physics of how gases and liquids move and although I can massage my ego by reminding myself that lots of people find it tough, I still suspect I’m much worse at it than most physicists.
You may have come across the entry-level stuff in school yourself. Things like Archimedes’ principle and buoyancy, terminal velocity and air-resistance, gas pressure and expansion etc. They’re all topics I feel edgy when teaching, so if you're in my class and I look a bit nervous talking about these things, it's because I am!
In fact, to give you some idea of how lousy I am at fluid mechanics, I once managed to foul up a calculation so badly I ended up proving the Atlantic Ocean was 3 centimeters deep. Spoiler alert: it isn’t. Clearly this is a topic I’ve never been particularly…wait for it…fluent in! Ha ha ha! Fluid/Fluent? What an amazing use of language! I’m so freaking hilarious! OK, but seriously, buy my book.
And Finally, My Arch Nemesis
If Physics was a 90s video game, the boss at the end of the last level would be (for me at least) the topic of circular motion. Batman has the Joker. Sherlock Holmes has Moriarty. Kanye West has rational thinking. I have circular motion. My ancient rival, tormenting me since before time began.
Circular motion is, as the name suggests, the physics of things moving in circles. Anything from the moon orbiting Earth to balls going round on strings. It’s counter-intuitive, it’s fiddly, it’s mathematically fiendish and it kicks my butt every single time I grapple with it.
With most of the subjects I teach and write about, I understand them deeply enough to explain them in lots of different ways, but when it comes to circular motion I basically just know the facts. I don’t feel like I truly grasp them in my gut. I just cannot get my head round it (I’d like to claim that pun was intentional but it wasn’t. It was, in fact…pun-intentional).
I first encountered this jackass of a topic while studying A-level physics myself at the age of 17. I knew right away it was going to be trouble and the exam I sat on it was so horrible I remember coming out of it and making the joke to one of my friends: “well, there go my University options”. In fact, my score on that exam cost me the top grade at A-level because I nailed all the other papers but bombed that one hard.
This experience of learning circular motion has scarred me so much that I can barely listen to Circle of Life without feeling deep bitterness, and every year when we’re carving up the syllabus to teach, my head of department knows “Don’t give the circular motion topic to tim!” because I’ll go on strike if I have to teach it.
There Is Nothing To Be Ashamed Of
Everyone likes to feel smart. We place a huge value on intellect and it’s no wonder people never want to admit when they can’t do something. But I really think we need to change that mindset. STEM is a vast subject encompassing everything from how lions breed to how computer networks function. Given the sheer amount of information and skills that fall into STEM, it would be weird if you didn’t suck at at least some of it.
There’s so much out there to learn, it’s ridiculous to set yourself the target of being good at everything you ever study. Sometimes you can be smart and still suck at something. That doesn’t mean you’re slow. It simply means you find some stuff hard. Like everyone ever.
I have to remember that just because I can’t do certain parts of STEM with ease, doesn’t mean the bits I can do are suddenly tainted or devalued. In fact, I think this is one of the most important things to remember about the scientific community in general: it's a team effort and it has to be. We're trying to figure out the Universe, nobody can do that on their own!
I’m not very good at Biology but that’s OK because there are plenty of doctors and zoologists who have me covered. I’m not very good at mental arithmetic, but that's OK because Charles Babbage and Ada Lovelace invented the calculator! I’m not too hot on fluid mechanics but that's OK because there are so many chemical engineers out there I don’t need to worry about it. Circular motion…that’s a thing which exists.
While I’ll always strive to better myself and face intellectual challenges as they come, I can accept that some parts of STEM I need other people’s help on. And that’s a good thing. That’s what makes STEM so awesome; the collaborations it leads to. Being good at everything has its advantages but it isolates you quite a lot. Being human is much better because it means not only can you help other people when they’re stuck, they can help you too. Not only is there something for everyone in STEM, but there’s someone for everything.
Good luck to all the students out there starting new courses and to all the fallible educators doing their best to help!!!
Stranger Things Have Happened
I've recently been enjoying the third season of the Netflix original series Stranger Things, directed by Matt and Ross Duffer. If you've not run across it, Stranger Things is a nostalgia smoothie of 1980s pop-culture, homaging the sci-fi/horror works of Stephen King, John Carpenter, Steven Speilberg, Tobe Hooper and George A. Romero, with a few Weird Al Yankovic songs sprinkled in for good measure.
It's mostly harmless cotton-candy fun, blending coming-of-age drama with gross-out-horror, and does a nice job of honouring Generation X Hollywood without ripping it off. As someone whose adolescence included a healthy diet of these movies/novels/comics, I've enjoyed all three seasons so although I didn't grow up in 1980s small-town America I can enjoy it for the flashy, splashy, trashy homage-athon it is.
The central conciet of Stranger Things is that shady government forces have accidentally opened a portal to a parallel universe (oops) through which horrible beasties come crawling, and only a group of bicycle-riding pre-teen nerds can save the world from annihilation. Oh, and one of them is telekenitc. As I say, I didn't grow up in 1980s America, so I can only asssume this was a pretty common occurence.
In the show, this alternate dark-dimension is neatly called "The Upside Down", a reference to flipping a Dungeons and Dragons board upside down to get to the dark side of existence. Alternate realities have been a staple of fantasy and myth for centuries, but the idea was formalised in science fiction in the 1934 short story Sideways in Time by Murray Leinster, in which humanity learns there are parallel versions of Earth occupying the same space and time, only on a different frequency, the same way radio station signals exist in the same location but can only be picked up one at a time.
Surprisingly, and rather awesomely, in the last few decades theoretical physics has started taking the idea of parallel realities seriously because they may be necessary to explain some of the most puzzling phenomena about the world around us. By my count, there are three main places in modern Science where parallel universes are talked about, so let's take a look at what physics says about the Strangest Things of all...the laws of nature.
1. The Many Worlds Hypothesis - Quantum Mechanics
I don't want to give too much away on this one, because I've got a book out in less than a month which has a whole chapter on the topic (click here to pre-order Fundamental). I'll whizz through the basics however.
One of the many peculiarities of quantum mechanics is that particles are seemingly able to do more than one thing at a time, even things which are contradictory. Consider the humble light bulb, a device which can be switched either on or off, but never both simultaneously. This seems like an inviolable law of logic: something cannot be in two mutually exclusive states at the same time. Individual particles however do precisely that - an electron can choose to spit out a photon (a particle of light) and simultaneously not spit it out, meaning the electron is both giving out light and not. Although the everyday world seems to follow the laws of logic, quantum particles have no interest in them. Take that, Aristotle!
Unfortunately, we have no way of really understanding how this is possible. There are a few ways of tackling the idea to make it more palatable for our feeble brains however, the most popular of which was the view promoted by Werner Heisenberg (of Breaking Bad fame) and Niels Bohr (of I Hate Einstein fame). In their way of looking at things, you just sort of shrug your shoulders and decide nature doesn't have to make sense to us. If particles want to do contradictory things we have no choice but to let them. But not everybody is happy with that approach.
Probably the most talked-about alternative is the one suggested by Hugh Everett III, who pointed out that although we know particles can apparently do opposite things at the same time, when we observe them we only see one outcome. We have never actually detected the light bulb being on or off together, even though we can infer it must be happening, so Everett suggested both states exist in different Universes, only one of which we can see.
That, according to Everett, explains the bizarre dual nature of particles. There are two overlapping Universes and particles can take entirely different choices/paths in each one. We can infer and calculate that both are taking place at the same time, but we can only ever witness one reality - the one we are in. It's a crazy idea but large numbers of physicists, including Richard Feynman and Stephen Hawking, felt it was the only way to make head and tail of the mystery.
This means there could be a vast number of parallel Universes in which a countless number of events have taken place. The laws of physics would basically be the same, but the way particles choose to operate within those laws could be different everywhere. There are Universes where the particles in your brain have done different things, meaning you have made different choices and lived a different life entirely.
2. The Multiverse Hypothesis - Cosmology
The Universe exists (spoiler alert) and within it, there are physical laws which allow it to do so sesnibly. Things like the law of gravity, electricity and magnetism, nuclear decay, the behaviour of atomic nuclei and so on. If any one of these laws were changed a little bit, the Universe would look very different to the point of being unrecognisable.
For instance, take gravity. A Universe in which gravity did not exist would be totally unfamiliar. Not only would the apple never fall in front of Newton, it would not have existed in the first place because there would be no solar systems, no planets and no objects on their surfaces.
At the start of the Universe there were just a bunch of particles free-floating with little to do with each other. Gradually these particles started sucking themselves inwards until they were crushed into hot balls of plasma - suns - and the only way for this to happen is through gravitational attraction. No gravity, no stars. And, if there are no stars, there is no way for heavier elements to get formed via the fusion process, no heavier elements means no chemistry, and therefore no planets either. Without gravity, the Universe would be one big, boring cloud of hydrogen and helium. In a very real sense, you owe your existence to gravity.
Or let's instead suppose all the laws of physics did exist but in different ratios. What I mean by that is that the strengths of the various laws could be totally different to what they are for us. For instance, there is a force inside the core of a nucleus called the "Strong Force" because it holds protons and neutrons together strongly - gotta hand it to physicists for creative nomenclature.
If the Strong Force were not quite so strong, protons and neutrons would not stick together, meaning atoms would not exist. Forget a big cloud of hydrogen and helium, without this force being strong enough, there would be no freaking atoms at all!
In fact, we are susprisingly lucky that the fundamental forces of nature interact the way they do. Tweak them just a little and physics looks very different. So...how come we're lucky? Is there some reason the laws of physics just happened to fall into just at the right strengths to allow the beauty we take for granted to exist? There are a number of possible explanations.
The first is that it's due to random chance and that we were simply fortunate. Another explanation is that the Universe was arranged this way by a benevolent science-loving entity, which some people call God. Another explanation is that there are trillions of Universes out there all existing in different regions of space like bubbles in a foam. Inside each Universe the laws of physics are slightly different, and we just happen to be in one of the more interesting ones. This idea is called the Multiverse hypothesis and explains why the Universe is so conveniently put together. It's not that the Universe is special, it's just that there are so many Unvierses anything is possible in at least one of them.
3. The Bulk Hypothesis - String Theory
The Many Worlds and Multiverse hypotheses are quite similar. They both propose many Universes with alternate timelines and everything distributed at random with us experiencing just one of them. The physicist Leonard Susskind has even published a paper arguing that these two hypotheses could be the same thing. He proposes that random fluctuations during the big bang meant the laws of physics chose different identities in different realities before branching off. In this view, the Multiverse idea is just what you get as a consequence of applying the Many Worlds approach to the big bang itself. The Bulk Hypothesis, which we get from String Theory (which Susskind co-invented) is very different though.
String Theory is a hell of a subject and I plan to write about it in more detail in the future. For this blog however, we only need to focus on one small aspect of the theory: stacking branes.
In String Theory there are no such things as particles. Instead, all the laws of physics can be explained using a buffet of different objects which interact with each other in complicated ways. One of these objects is called a string...duh...but more relevant to our purposes are objects called Branes (short for Membranes). Membranes are surfaces which can be layered together like pages in a book, each one entirely separate to the one adjacent and the pile of membranes is referred to as a "bulk".
Now imagine an Atlas which has a 2D image of the world on every page. These 2D worlds would be stacked together in a 3D bulk and to any 2D creatures living on the page they would have no idea there was another world right next to them. Now all you have to do is imagine the whole thing in higher dimensions...easier said than done of course.
In The Bulk Hypothesis of String Theory, our Universe could be a 3D membrane, stacked alongside other Universes in a 4D bulk. We just can't see these other Universes. The same way a 2D being could not perceive a third dimension, we cannot perceive a fourth, but there is no reason such a dimension could not exist. In this view, there could be countless parallel worlds all around us, separated along a dimensional axis we cannot see.
Which Is The Upside Down?
The Upside Down in Stranger Things is the classic "dark dimension" where evil psychic tentacle monsters exist, and there are no Ikeas. The scientists in the show are able to access it using a bunch of hand-wavy Universe-penetrating machines in order to exploit a place where the Upside Down Universe and ours are so close the barrier between them is thin. And this actually gives us a major clue about which alternative Universe The Upside Down has to be.
One of the key features of the Many Worlds hypothesis from quantum mechanics is that you can never observe the other reality where particles are doing opposite things. In fact, when two overlapping Universes take different routes they are said to "decohere" from each other and we can only detect them indirectly through the mathematics of our experiments. The many worlds of quantum mechanics are completely inaccessible. Which rules them out.
The same can also be said of the Multiverse hypothesis. In this one, the different Universes are either separated by enormous distances in space, or enormous stretches in time and we have no way of getting to any of them by conventional means. We could potentially create a wormhole between the dimensions but statisically we would be far more likely to find a Universe where the laws of physics are completely different. In Stranger Things, the Upside Down is different to our reality but is still pretty close; everything is made from atoms, carbon-based life-forms exist, there is a weather system, light and electricity behave in a similar fashion etc., so it is very unlikely The Upside Down is part of the Multiverse.
But The Bulk Hypothesis works nicely. If we were to connect to one of the other membranes of the bulk, it would probably be somewhat different to our own Universe, but close enough to be recognisable. The same basic laws of physics would apply, just with a few minor discrepancies - which is what we see in the show. In fact, the show makes a big deal of objects and locations in our world corresponding to objects and locations in the other one e.g. we don't open a portal to the Upside Down and find ourselves in the middle of empty space - there's a planet the same size as ours on the other side, with the same gravity and roughly the same geography.
What's more, the other membranes of the bulk are the only ones we might actually have a way of "reaching". Whereas the many worlds and multiverse realities are completely separated from ours, in String Theory, there are hypothetical particles called gravitons which can move from one membrane universe to another, allowing two universes to talk. Perhaps if we found a way of controlling a graviton beam (which the scientists in the show seem to have done) we might be able to send a pulse from our Universe to the next one along, opening a channel across which information and maybe even matter might be exchanged. What's more, once this rift in the bulk had been opened it would be very difficult to close...leading to huge problems and lots of useful plot developments. So there you have it, Elven and the gang are early pioneers of String Theory!
Personally, I find it pretty cool that the ideas of a speculative TV show like Stranger Things are actually matched by real developments in theoeritcal physics. Sometimes sci-fi shows have no regard for real science, which is fine of course (it's entertainment not education), but I always find it rewarding when there's a plausible way to justify the fun.
The only other show to feature String Theory in any detail was NBC's dubious sitcom The Big Bang Theory, which I have written about here. That show also attempts to mash-up a bunch of nerdy pop culture references but the main difference is that in The Big Bang Theory the nerd characters just spend their time arguing over movies and sex, whereas in Stranger Things the nerds get to save the world.
One year ago, I published a couple of blogs outlining (1) How I somehow became a science author and (2) How I wrote my first book: Elemental. I concluded them both by saying that whether my book was a success or not, I was just honored to have the chance at getting one published. It probably seemed like I was covering my ego’s back there, but I was being truthful. Really.
It was actually quite a surprise to feel that way. I assumed that in the run up to release-date I’d be pining for a success, but I actually became very stoic about the whole thing…I was just happy to have my own book. If it flopped then so be it. How many people get such an opportunity in the first place? Obviously, I wanted people to read and enjoy my work, but I was not aiming for glory.
It was released on July 1st 2018 and, after finishing up my day-job as a school teacher, I headed to my local bookshop to do a signing. It has to be said, it’s a very cool feeling to see your book on the shelves amid the works of…y’know…real authors. But it felt more like the end of a journey rather than the beginning of one. The book was complete, the work was over, now I just had to accept whatever happened.
In fact, if I’m being totally honest, I didn’t expect Elemental to be a hit. It’s a biography of the periodic table - something most people famously hated in school. I figured I’d sell a few hundred copies to my gran perhaps, but that would be the end of it. The shock I got when I learned that Elemental has been a success still hasn't sunk in.
“Yeah it’s doing OK thank you”
People are so supportive when you do something like this and I get asked all the time how the book is doing. It’s really nice that people take such an interest, but I tend to respond in the same way every time I'm quizzed about it. I sort of shuffle my feet and mumble bashfully that it’s doing fine thanks.
I have no clue why I act like this! I respond to people asking about my book the same way I would respond if they were asking about an inflamed gall bladder - like I’m ashamed of the success or something? It’s flattering that people actually want to hear about it, but I guess it's because I don’t know what the etiquette is for an author whose book is doing well. Do people want sales figures? Do they want to know how much money I’ve made? Do they want to know what the critics have been saying?
I tend to be fairly coy about the whole thing and people have to dig it out of me, but I’ve been informed by enough people that being a tad boastful about my achievement would be acceptable, even healthy.
I dunno, it feels a bit weird to acknowledge it, but I will say that Elemental did a lot better than I or my publishers anticipated. It sold out on Amazon within a few weeks and they had to print a second run. Bookshops had to order double the typical amount and it was stocked in at least eight countries I’m aware of, being translated into three other languages. I got featured in Science magazines, did interviews for BBC radio and The Daily Mail listed it as one of the top books of 2018. Even The New York Post arranged an interview with me for the US release - although sadly that never made it to print (I’m not quite that famous yet!)
However, the most gratifying thing about the whole experience, more exciting than the prestige of telling people I’m an author, is the messages and reviews I get from people telling me how much they enjoyed and learned from it.
I’ve received e-mails from people I’ve never met in countries I’ve never visited whose language I don’t even speak, telling me they enjoyed Elemental. I’ve had people e-mail me saying the book has persuaded them to study chemistry at University and I’ve even had people tell me they’re reading it to their kids as a kind of bizarre bedtime story.
The positive response has been worth all the stress and gave the publishers confidence in me as a writer. That was the main reason I wanted to do well…so they’d give me a chance to write more! And, thanks to the response of my loyal readership, two weeks after the release of Elemental my publishers at Little, Brown offered me a deal for a sequel.
They liked the format of Elemental, being a humorous and informal guide to Chemistry, so they asked what other topics I could do it with. This was quite different to last time. When my agent and I first approached publishers we were trying to persuade them to take a chance on me, but now I had proven myself they wanted to see if I had more tricks up my sleeve. I did. There wasn’t even a moment’s hesitation. It had to be quantum mechanics...
When people ask what my favourite area of Science is, I usually respond with the same joke: “Oh I don’t have a favourite, I love all of it. Also, quantum mechanics.”
When I was a teenager my science teacher, Mr Evans, gave me a textbook on the subject and, putting it simply, I fell in love. That sounds mawkish but honestly the feeling wasn’t all that different. I became obsessed with it to the point of adoration and could think of nothing else. Studying it made me happy and I wanted other people to see its beauty.
The basic premise of quantum mechanics is that there are two Universes around us. There’s the universe of everyday “big” things, where laws of logic and common sense hold and then beneath the surface, at the scale of atoms, there’s a different world entirely; a world where the normal laws of physics no longer work and you have to let go of common sense for it to make sense. Quantum mechanics is full of parallel universes, teleportation and time travel as well as approaching profound questions of spirituality and consciousness.
Don’t get me wrong, I love chemistry and Elemental was a really fun book to write. But this one was going to be a passion project. Something I would be writing from the heart. First though, I had a difficult question to answer.
How the hell do you write about quantum mechanics in plain English?
As soon as the publishers gave me the greenlight, I outlined my chapters, got a library of textbooks by my bedside for research and then…I’m just going to admit this plainly…I was hit by a wave of self-doubt.
The pressure of a second book was enormous. Surely I should be playing it safe and writing about something easy! Why had I picked, of all things, quantum mechanics for my sequel? I kept thinking of when Josh Trank got hired to be the director of the Fantastic 4 movie following the success of his small indie-sci-fi horror Chronicle. Trank was not ready to tackle such a huge project and it resulted in a total mess - one of the worst super hero movies in history. Was I in danger of making the same mistake? What if I was a one-hit wonder whose first book did well only as a fluke?
Elemental worked because chemistry can be described in simple terms, without having to get too bogged down in technicality. Quantum mechanics, on the other hand, is so abstract and counter-intuitive that explaining it in plain English is impossible without covering the deep science. In chemistry, you can go straight to the fun bits without having to lay any conceptual groundwork, but in quantum mechanics it’s the reverse. In order to get to the cool bits you have to do the tricky stuff first.
That’s the reason physicists prefer to communicate about quantum mechanics through equations - describing this stuff in words is difficult, so it’s easier to come up with a bunch of symbols that represent “the weirdness” and not worry about understanding them. But I wanted to write a book about quantum mechanics without a single equation. That’s not impossible - if you can say something in mathematical symbols you can say it in english language symbols - but it’s a major challenge.
Then there was the problem of which bit of quantum mechanics to focus on. Some books focus on the experimental details, some tell the historical story of how we came up with it, some focus on pure explanation and some handle the philosophical implications. I wanted my book to be all of those things. I wanted to write a complete tour of the quantum landscape, but maybe I was in danger of becoming the Victor Frankenstein of Science popularisers - cobbling together things which did not belong and, in my hubris, creating a monster.
Then there was the biggest threat of all...quantum mechanics is a subject close to my heart. It’s always a risk when writers, musicians, filmmakers etc. get to make their passion projects because they can become self-indulgent. I wanted to make sure my second book wasn't just me going on about something I loved, I needed to show other people why I loved it and why they should love it too.
A Sweeping Epic
As soon as the contract was signed I felt I had bitten off more than I could chew. I started to doubt it could be done or whether I was the right person to do it. In fact, for the first few weeks I didn’t even begin typing - I was too afraid of writing something dreadful. But then I was reminded by a friend that this was a book I’d wanted to write since I was a teenager and that I had a lot to say. If I just got to work without second-guessing myself, maybe the book would just flow out of me. I decided to heed this advice and got on with writing the damn thing. Sure enough, once I started, I couldn’t stop.
Initially, one of the things which intimidated me was that the publishers asked for an 80,000 word manuscript. Elemental was half that size. The task of writing something so huge was daunting, but once I began, I found the stories I wanted to tell forming on the page as if it wasn't me writing them. By late August, I was up to 60,000 words with roughly two thirds of the intended material covered. I was going to hit my target…or so I thought.
A week before school term started I headed to publisher HQ in London to discuss my progress. I explained in a meeting, rather proudly, that I was on track with 60,000 words done already. At which point my publisher stared in confusion: “How are you going to cut it down?” he asked.
I think everyone experiences these moments of horror at some point in their lives. It’s the feeling you get when you suddenly know exactly what the bad news is going to be, but you have to ask for it anyway. Turns out there had been a typographical error in the contract. They wanted the book to be 45,000 words max.
God knows how someone accidentally types 80 instead of 45, but I was now seriously over my word limit, with only two thirds of the book done, and the deadline approaching in a few months. And I was about to start back at school (which is a pretty time-consuming job).
The suggestion was made at one point that I split the book into two - one focusing on the history of quantum physics and one focusing on recent developments. I probably would have made a bucket load more money doing that, but I didn’t want to pull a Deathly Hallows on my readers. People don’t like paying twice to get one story. So I decided I would just write the book in full, then trim it down from whatever size it ended up as. The final first draft wighed in at 76,000 words which I had to reduce by 40%. The only way to do this was to be ruthless.
My Only Advice
I don’t feel like I have much advice to give on the topic of writing. I’m new to it as a professional, but the one thing I would say to anyone wanting to become a writer is: pick your test audience well and listen to what they say. Chances are your first draft isn’t going to be a masterpiece and by the time you’ve finished it and put all that work in, you’re too close to know which bits work and which bits don’t. You need to get outsider opinions, you need to trust that they’ll be honest, and you need to act on their feedback.
As with my first book, I recruited a group of people to read the book from different perspectives and be cuttingly honest. I got friends who knew nothing about quantum mechanics, friends who were enthusiastic about it but not necessarily experts, friends who had degrees in the subject and friends who had no interest whatsoever…and asked them all to tear it to pieces as best they could.
Your ego has to take a hike here, because you’re not writing the book for yourself anymore, you’re writing for your readers. The early drafts are where you selfishly write the book as you think it should be…then you have to make it worthy of others. You can’t just sit there feeling smug; you have to expose it to criticism and actually accept it. Don’t argue with the people who review your early drafts, otherwise what’s the point in getting them to read it?
There were jokes which didn’t work and had to be removed. There were sections that made no sense or contradicted what I’d said earlier. There was even a bit where the legal team had to intervene because I spent a whole chapter making fun of a scientist I had forgotten was still alive and liable to sue. But, over the course of several stressful but productive months, we battered the book into shape and by the end of January 2019 it was ready. 45,000 words and a week left on my deadline
Ready for Round Two
The title for my second book had been something I’d joked about since before Elemental. Because Elemental was all about the elements, a book about the fundamental laws of particle physics should be called Fundamental. Presumably my future books will have to be about the brain (Mental), climate change (Environmental) and teeth (Dental).
Discussions then began about what the front cover would look like. As I explained in my previous blogs, the cover is of great importance because that is often the only advertising a book gets. We decided to model the design on a similar theme to Elemental - a simplistic image that would communicate a straightforward approach, as well as looking vaguely friendly and non-intimidating.
At least a dozen e-mails were exchanged about capitalization of words in the subtitle and which letters should be upper and lower case (really) as well as font sizes and styles. This attention to detail still surprises me, but it really is a testament to how seriously publishers and graphic designers take their craft. They absolutely want to hone the design to a point of perfection, so that everything about the cover says “give this book a go”.
Then came the audiobook. With Elemental, the audio was recorded by voiceover artist Roger Davies but for this one we decided it would work best coming from my own throat. I headed down to ID Audio Studios in London and spent two days sitting in a studio where such luminaries as Olivia Coleman, Bill Nighy, Roger Moore and Richard E Grant have recorded books, and then I talked for two days into a microphone as a producer directed me (mostly telling me to slow down because I have a tendency to talk fast when I get enthusiastic).
And now, Fundamental is ready. It will be published in the UK and a few other European countries on August 1st 2019 in paperback, e-book and audiobook. You can pre-order it now on Amazon if you want (which may seem pointless from a consumer perspective, but it helps me as an author by encouraging bookshops to stock it), and now I am ready for round two.
I’ve been here before of course, but this time I’m far more nervous. With my first book, I was just thrilled to have gone on the adventure. But as I write this, with publication a few weeks away, I’m feeling very different. It’s not that this book is a more ambitious project, nor is it the fact that there’s more money involved. When I really think about it, my anxiety comes down to something very simple: I don’t want to disappoint my readers.
With Elemental I didn’t have a fanbase so to speak. I mean the website gets hits and I have followers on Instagram and YouTube, but my debut book was published all over the world to people who had never heard of me. This time I have fans to satisfy. A group of people who enjoyed and learned from my first book and I want them to feel I’ve done them a service with the sequel.
I once heard an author, the name of whom I’ve forgotten, saying “I hope my readers enjoy reading it as much as I enjoyed writing it”. I see where they’re coming from but actually I want my readers to enjoy it more. Readers give writers their purpose and if you’re not concerned with keeping them happy, you’re just obnoxiously writing for yourself!
Fundamental was a fun book to write, but the only thing that matters is that other people read it, enjoy it, and learn from it. So, to all my fans out there, thank you for the overwhelming support you’ve shown for Elemental. I’ve put a huge amount of myself into Fundamental but I’ve written it for you. I hope you enjoy what I’ve created!
You can pre-order it here if you want to support the writing: Fundamental: How Quantum and Particle Physics explain absolutely everything (except gravity)
Welcome To Jurassic Park
If you’re anything like me, you probably have fond memories of Mr DNA, the animated strand of genetic material from Jurassic Park (shown below). During the first act of the film, entrepreneur John Hammond asks Mr DNA to explain how scientists have brought dinosaurs back to life so the audience can understand the plot. Interestingly, Hammond’s budget was sufficient enough to reverse 65 million years of evolution, but didn’t extend to animating Mr DNA with a head.
You probably also remember from school that the people who discovered DNA and figured out how it worked were James Watson and Francis Crick, who shared the 1962 Nobel prize for their work. But if you talk to most biologists today, you find that Watson and Crick are spoken of in the same shady tones that wizards use when discussing Lord Voldemort.
These two iconic figures, once heralded as the greatest biologists of the 20th century, have fallen into ill repute and their role in the DNA story has been exposed as a little less shiny than textbooks usually claim. Let’s look at the sordid story of DNA.
Oh and by the way, it’s important in scientific discussion to separate the scientist from their work. You may dislike a particular researcher but if their findings point to an obvious conclusion you have to put personal flaws aside and evaluate the discovery on its own merit. The fact that James Watson is on record as having made racist comments like claiming black people are intellectually inferior to white people is not something I need to mention in this paragraph. I probably won’t bring it up at all in fact.
What Is DNA?
When your mother was pregnant with you, her uterus had to find a way of turning all the food she ate into your body (happy belated mother’s day by the way). You did the same thing as you grew from a baby into an adult and are doing it right now as your cells die and need to be replenished.
You’re able to reconstitute food this way thanks to nanoscopic biological machines called ribosomes that live in your cells and have the ability to draw in chemicals from digested food before sticking them together in the right order to make a bit of liver, a bit of heart, a bit of lung etc. Ribosomes are like building contractors, but in order to do their job they need a blueprint. This is where DNA comes in.
DNA is the molecule which stores information the ribosomes use. It’s the molecule responsible for all your inherited characteristics and the reason evolution takes place at all. The way DNA works is ingenious but confoundingly complex, so I’m going to simplify it and give a crude physicist’s understanding of the process. Enjoy…
Firstly, there are four molecules we need to meet called Adenine, Thymine, Guanine and Cytosine. These molecules - collectively called nucleobases - are each bonded to two other types of molecule called phosphate and deoxyribose, which join together in a long chain (shown below). The backbone of the chain is made from alternating phosphate-deoxyribose units, with the nucleobases hanging off like pegs on a clothes line.
Nucleobases are attracted to each other and if you get two of these strands lined up side by side, the nucleobases link to form the rungs of a ladder. Due to their specific sizes and shapes, A always pairs opposite T and G always pairs up opposite C, meaning the backbones of the structure stay at a constant distance. Then, as you probably know, the chains twist into a double helix, like so…
When DNA is needed for decoding, the strands of the ladder are unzipped, exposing the nucleobases so that a ribosome can read them. There’s a whole bunch of steps which take place but the gist is that the sequence of As, Ts, Gs and Cs, are read by a ribosome like a cassette-tape fed through a player (if that analogy doesn’t make sense because you have no idea what a cassette tape is…ouch).
As ribosomes move along the nucleobase chain, they analyse it like fingers gliding over Braille. The ordering of the ATG and C molecules tells the ribosome how to arrange molecules from your food into a specific body-part protein and thus the living organism itself (shown below).
Changing the order of the nucleobases completely changes what the ribosomes build, which is why tiny variations in DNA can lead to major differences in the organism. Put the bases together in one order and the ribosomes will build a goldfish. Rearrange them just a little and you get a gooseberry.
Oh and technically I should mention there is a fifth nucleobase called Uracil which your bio-machinery uses as part of the process, but I’m going to ignore it in my explanation because it just convolutes things. Sorry Uracil, you aren’t needed for this. Ura-still important though. (I don’t know what I’m doing with my life).
So, Watson and Crick Figured That All Out?
The general idea of DNA was actually suggested by Charles Darwin in 1859 when he published On the Origin of Species. In order for his theory of evolution to work, it was necessary that genetic information be encoded inside a living thing somehow and copied with occasional errors. Obviously Darwin had no idea we needed to be looking for a specific molecule (we didn’t even know atoms existed at this point) but he knew the body had to have some mechanism for storing genetic information. Frankly, if we hadn’t discovered and figured out the behaviour of DNA, Darwinian evolution would still be just a hypothesis rather than a theory we teach in Kentucky high schools.
DNA itself was discovered ten years later by Friedrich Miescher who was doing experiments on bandage-pus obtained from a Swiss hospital (There. Right there. That’s why I chose physics and chemistry over biology). Miescher discovered that most white blood cells contain an acidic chemical in their nucleus - hence the “NA” part of Nucleic Acid - which had a lot of phosphates in it. Miescher had no idea what the significance of the chemical was, just that the body seemed to contain a lot of it.
Then, in 1878, Albrecht Kossel found that nucleic acid contained the nucleobases A,T,G and C, while Phoebus Laverne discovered they were bonded to deoxyribose sugars - hence the “D” part of the name “Deoxyribose Nucleic Acid”. The idea of DNA being made of chains with nucleobases sticking off them was suggested by Nikolai Koltsov and we thus had a good idea of what DNA was. We just didn’t know what it was for.
That was until 1944 when Oswald Avery discovered something surprising about it. Avery found that by transferring the DNA of a harmful virus into a harmless one he could convert the safe virus into a lethal one i.e. the defining characteristics of a thing, the very notion of inherited characteristics Darwin had proposed, was the DNA molecule. Figuring out the structure of DNA would give us the key to life itself.
Then, in 1950 Erwin Chagraff discovered that the amount of Adenine in DNA is always equal to the amount of Thymine, while the amount of Guanine is always equal to the amount of Cytosine - suggesting nucleobases were somehow paired up. All we had to do was figure out how. And this is where the backstabbing begins. (Unlike Watson's racist comments which came several years later)
Lady of Crystal
The same year as Chagraff’s discovery, a talented physical chemist named Rosalind Franklin came to work at King’s College London as a research associate with the Medical Research Council. She was given the task of analysing crystals of DNA using X-ray crystallography (a way of taking photographs of a molecule) alongside another scientist named Maurice Wilkins.
Franklin was a skilled scientist with several papers to her name, but felt a bit of an outsider, being one of the only Jewish researchers at King’s College. Her feeling of isolation was not helped by Maurice Wilkins who openly badmouthed her and treated her as a lab assistant rather than an accomplished scientist in her own right.
She persevered however and by 1951 had gathered useful data about DNA. In November of that year, she gave a lecture in which she explained “the results suggest a helical structure which must be very closely packed, containing 2, 3 or 4 co‐axial nucleic acid chains.” In attendance at this lecture was James Watson, a geneticist from America studying at the Cavendish laboratory in Cambridge. A week after hearing Franklin’s lecture, Watson and his lab partner Francis Crick proposed that DNA might be helical. Wonder where they got that idea from.
Watson explained in his book The Double Helix that he hadn’t really been paying attention to Franklin’s lecture however, because he was more distracted by her unflattering womanly appearance…so I guess…that’s a defence??? I mean we only have his word for it that he was more of a misogynist than a plagiarist, but in any case he relayed the gist of Franklin’s lecture to Crick and they built a 3D model of the structure: a triple-helix of deoxyribose-phosphate threads with nucleobases sticking out the sides.
As chance would have it, the following month Rosalind Franklin was visiting the Cavendish laboratory, having been invited by its director Lawrence Bragg. When Franklin saw the triple-helix model she immediately explained that it was chemically impossible because phosphate backbones repel each other, meaning the helix Watson and Crick had proposed would tear itself apart in seconds.
Bragg was so embarrassed by this that he told Watson and Crick to drop the project and leave the structure of DNA to Franklin. They officially complied and sent Franklin their disassembled model, possibly to give her a hand but possibly as a childish taunt.
Franklin continued her research and by May 1952 had perfected the technique required to crystalise DNA and take a snapshot. Her best result was an X-ray plate titled Photograph 51 (shown below) taken right down the axis of the helix, which was then written up for the Medical Research Council.
In January of 1953, Maurice Wilkins (the guy who hated Franklin) wrote to Francis Crick and suggested they collaborate on the structure of DNA again. He finished his letter by stating: “Let’s have some talks…when the air is a little clearer. I hope the smell of witchcract will soon be getting out of our eyes” – referring to Rosalind Franklin who had recently applied to be transferred.
Then, on 30th January, James Watson was visiting Wilkins to complain that if they didn’t solve the structure of DNA, somebody else would get the glory (most likely the American Nobel prize winner Linus Pauling who had recently published his own triple-helix model). Unable to find Wilkins, Watson instead went to Rosalind Franklin and got into a row with her after telling her she wasn’t able to interpret her own data and would need his and Crick’s help to do so. Wilkins arrived on the scene and took his friend Watson away from “the witch” and then decided to comfort him by showing him Photograph 51 – without Franklin’s permission.
Watson went straight back with the information and Crick began speculating on what it might be showing. He had recently come across Chagraff’s discovery that nucleobases were paired together but couldn’t figure out how. Then came the crucial month. February 1953.
Round about Valentine’s day, Rosalind Franklin wrote in her lab notebook that DNA was made from two chains of deoxyribose-phosphates, wrapped around the outside with nucleobases on the inside. Basically, she solved the structure of DNA. At roughly the same time, Max Perutz, Francis Crick’s thesis advisor, showed Crick Franklin’s data from the unpublished MRC report – again without Franklin’s permission – and Crick made a crucial deduction. The two strands of DNA wound about each other in opposite directions.
He and Watson set about building a model to show this and finally, on 28th February, Crick announced to his friends in a local pub that the structure had been solved. Franklin was already in the process of writing up her own research and, on 17th March, learned that Crick had already begun announcing himself and Watson as the discoverers.
Graciously, she added a note to her paper saying that her results agreed with their structure and on 25th April, Watson and Crick published the idea. Watson and Crick did at least admit in the article that their work was “stimulated by the unpublished ideas” of Franklin but gave little indication that she basically came up with most of it.
Sadly, Rosalind Franklin died in 1958, four years before the Nobel prize committee decided to award that year’s prize for DNA and the prizes are not awarded posthumously so her name was not featured. Instead, the prize went to Francis Crick (who published the double helix theory first), Maurice Wilkins (who did some of the experimental work) and James Watson (a scientist).
So the timeline is roughly as follows...
1859 – Darwin proposes the idea of a genetic code
1869 – Meischer discovers DNA
1878-1928 – Kossel, LaVerne and Kotslov figure out what DNA is made of
1944 – Avery discovers what DNA does
1950 – Chagraff discovers nucleobase pairing
1951 – Franklin suggests DNA is a helix, Watson attends the lecture but doesn’t get it right
1952 – Franklin takes “Photograph 51” which looks helical (May)
1953 – Maurice Wilkins shows Watson photograph 51 (January) who then tells Crick about it
1953 – Franklin almost figures out the structure (early February)
1953 – Perutz shows Franklin’s data to Crick (mid February) who figures out the structure
1953 – Crick announces the structure has been solved (late February)
I am the Law
Franklin was treated horribly by the men involved; that much isn’t in dispute. Even Crick admitted “I'm afraid we always used to adopt -- let's say, a patronizing attitude towards her.” The human interest story is therefore that Franklin was mistreated by three men who got rewarded, with her name becoming a footnote. However, the question remains: did the men break any codes of conduct or were they just being sneaky?
Was Wilkins wrong to show Watson Photograph 51 without Rosalind Franklin’s consent? Was Perutz wrong to show Franklin’s data to Crick? Was Watson “stealing” Franklin’s helix idea after seeing her lecture or was he simply building on her work? The morality is a little unclear for one big and important reason: there is no law or governing body in Science. Science works as a collaborative effort and the sharing of ideas is a necessary part of the process – which kind of muddies the waters on what counts as stealing an idea and what counts as testing it.
The only real law scientists hold to is: “don’t make it up”. Other than that, Science is the search for truth and you can’t trademark that because it belongs to everyone. It’s largely accepted that scientists should give each other credit when appropriate, but if people choose not to, there is no “official punishment”. Science is a self-regulating community with nobody in charge, which means that if a Scientist is unethical it’s up to other scientists to exact informal justice.
Sometimes, the scientist’s university will strip them of their titles (as happened to Watson when he made those comments about black people), sometimes they will not get funded again, or never be published in another journal. But they don’t have their Science license revoked and go to Science prison because there’s no such thing.
In the case of Watson (and to a lesser extent Crick) the general response has been to simply judge them as jerks and subtly badmouth them wherever possible. What else can we do? Franklin was 95% of the way to solving DNA but in fairness Crick was the guy who made the final step and published first.
If we assess the facts dispassionately then I think Crick does deserve some of the credit for the DNA discovery. That doesn’t seem fair because he solved it by nefarious means, but I said at the beginning that we have to evaluate the science and the scientist separately. Crick did make a contribution so he deserves to be acknowledged, but I am still allowed to say that what happened to Franklin was downright despicable!
The Great Relay Race of Science
Watson, Crick and Wilkins’s behaviour toward Franklin was not nice but DNA got solved and that’s what matters. We got to the final answer in stages rather than as one revolutionary breakthrough and it’s hard to single out any one person as having been the most instrumental, (although Rosalind Franklin is probably the standout candidate having both carried out the experiments and interpreted the data correctly).
Science is often like a relay race where each person gets the baton for their stretch of the track. The person who actually crosses the finish line (Crick) might get the cheer but they are no more important than the other members – remove any one of them and the whole team loses.
Sadly, or perhaps fairly, that’s how credit tends to work. It’s the person who gets the answer first who is praised, even if they were just adding final touches to other people’s ideas. This is a result of human psychology more than anything else. We like praising people for achievements and we aspire to be like our heroes, but our brains are wired to focus on individuals rather than ensembles. Unfair perhaps, but nobody ever said evolution was fair – thank DNA for that.
As a final thought, I will share that I was recently the subject of outright scientific plagiarism myself. A blog I wrote on “The Science of Infinity Stones” was copied word for word by someone who I will not name and reposted on Instagram without crediting me. They didn’t even paraphrase the damn thing – they literally copy-pasted it word for word and blocked me before I could let anyone know. The person’s account has tens of thousands of followers, many of whom commented how great the post was and that the person should write a book (irony).
I was mildly annoyed about this for a moment, but then I realised I didn’t care that much. I wrote the blog for free and just wanted to entertain and educate. The phrasing and humour is obviously my invention but the Science isn’t “mine” at all. Ultimately, my ideas were being read and people liked it – that’s pretty gratifying in itself!
Getting credit is nice because it boosts the ego but if I’m honest, that’s not the reason to do Science or to teach it. You do it to make the world a better place and sometimes that has to be good enough. Of course, if that guy wins a Nobel prize for my post, I might change my tune.
If you want to find out a bit more about the complex history of Franklin, Crick and the other two, check out my sources...
I love science, let me tell you why.