Call for volunteers who want to want to exercise.

Looking for: Volunteers who would like to treat their anxiety or mood disorder with exercise, who have been inhibited by their anxiety or mood disorder. Second choice: volunteers without those things who have been looking to start exercising but have been inhibited by the fact that exercise is hard, or would otherwise like to change their relationship with exercise.   You would be volunteering to read a fairly short book and follow its prescriptions for a predetermined length of time
“Eat right, sleep, and exercise” is a common prescription for depression and anxiety, which would be great if constant fear, hopelessness, and fatigue didn’t make exercise so hard.  I’m spot checking/reviewing Exercise for Mood and Anxiety, whose thesis is using mindfulness and CBT to make exercise immediately rewarding so you can start a virtuous cycle. I’ve checked their work and all the theory that went in to designing this program is very solid, it’s my high watermark for pop-psych-self-help, but the actual prescriptions have no testing. They seem like natural outgrowths of the principle and other parts of psychology, but humans are complicated and before I recommend this book I’d like to test it. I can’t test it on myself because I already exercise and experience immediately mood benefits from it (which is pretty great, and I heartily recommend).
If you are interested, please fill out the pre-survey and commence reading. I can loan my kindle edition to an unknown number of people, and if demand is high and price is prohibitive for you can buy a certain number of paperbacks. If you don’t want to participate in the trial but are very interested in the results, I would be very grateful for subsidies of book purchases, my patreon money won’t cover a single copy.

Review: The Dueling Neurosurgeons (Sam Kean)

If you might this blog, you might like…

I originally intended The Tale of the Dueling Neurosurgeons for epistemic spot checking, but it didn’t end up feeling necessary.  I know just enough neurobiology and psychology to recognize some of its statements as true without looking them up, and more were consistent enough with what I knew and what good science and good science writing looks like; interrogating the book didn’t seem worth the trouble.  I jumped straight to learning from it, and do not regret this choice.  The first thing I actually looked up came 20% of the way into the book, when the author claimed the facial injuries of WWI soldiers inspired the look of the Splicers from BioShock.*

[*This is true. He used the word generic mutant, not the game-specific term Splicer, but I count that under “acceptable simplifications for the masses”.  Also, he is quicker to point out that he is simplifying than any book I can remember.]

At this point it may be obvious why I think fans of this blog will really enjoy this book, beyond the fact that I enjoyed it.  It has a me-like mix of history (historical color, “how we learned this fact”, and “here’s this obviously stupid alternate explanation and why it looked just as plausible if not more so at the time”*), actual science at just the right level of depth, and fun asides like “a lot of data we’ve been talking in this chapter on phantom limbs about comes from the Civil War.  Would you like to know why there were so many lost limbs in the Civil War?  You would?  Well here’s two pages on the physics of rifles and bullets.”**

[*For example, the idea that the brain was at all differentiated was initially dismissed as phrenology 2.0.

**I’m just going to assume you want the answer: before casings were invented, rifles had a trade off between accuracy and ease of use.  Bullets that precisely fit the barrel are very hard to load, bullets smaller than the barrel can’t be aimed with any accuracy.  Some guy resolved this by creating bullets that expanded when shot.  But that required a softer metal, so when the bullet hit it splattered.  This does more damage and is much harder to remove.]

I am more and more convinced that at least through high school, teaching science independent of history of science is actively damaging, because it teaches scientific facts, and treating things as known facts damages the scientific mindset.  “Here is the Correct Thing please regurgitate it” is the opposite of science.  What I would really love to see in science classes is essentially historical reenactments.  For very young kids, give them the facts as we knew them in 18XX, a few competing explanations, and experiments with which to judge them (biased towards practical ones you know will give them informative results), but let them come to their own conclusions.  As they get older, abandon them earlier and earlier in the process; first let them create their own experiments, then their own hypotheses, and eventually their own topics.  Before you know it they’re in grad school.

The Dueling Neurosurgeons would be a terrible textbook for the lab portion of that class because school districts are really touchy about inducing brain damage.  But scientists had a lot of difficulty getting good data on the brain for the exact same reason, and Dueling Neurosurgeons is an excellent representation of that difficulty.  How do we learn when the subject is immensely complex and experiments are straightjacketed?  I also really enjoyed the exploration of  the entanglement between what we know and how we know it.  I walked away from high school science feeling those were separable, but they’re not.

You might like this book if you:

  • like the style of this blog. In particular, entertaining asides that are related to the story but not the point. (These are mostly in footnotes so if you don’t like them you can ignore them).
  • are interested in neurology or neuropsychology at a layman’s level.
  • share my fascination with history of science.
  • appreciate authors who go out of their way to call out simplifications, without drowning the text in technicalities.


You probably won’t like this book if you:

  • need to learn something specific in a hurry.
  • are squeamish about graphic descriptions of traumatic brain damage.
  • are actually hoping to see neurosurgeons duel.  That takes up like half a chapter, and by the standards of scientists arguing it’s not very impressive.


The tail end of the book is either less interesting or more familiar to me, so if you find your interest flagging it’s safe to let go.


This post supported by patreon

Better Pay(ment System) for Pro Athletes

Pro-athletes as a group are terrible with money. It’s not merely that they’re bankrupt within a few years of leaving their sport; many don’t save enough cash to make it through the off season.  You could blame the athletes, but the system is really set up to create this problem. You’re taking mostly poor 22 year olds, selected for their ability to take risks and disregard odds, telling them they’ve won their ultimate dream and giving them more money than anyone they know has ever had.  Of course that goes poorly.  I’ve watched programmers from middle class families go kind of nuts their first year working, and that’s a much smaller transition they’re much better prepared for.

The money goes to a few major places

  1. Status competitions with other athletes
  2. Helping out people the athlete genuinely wants to help- his loving mother, the little league he got started in.
  3. Helping out people the athlete doesn’t want to help, but can’t figure out how to say no to- abusive parent, cousin’s former neighbor’s boyfriend
  4. Child support
  5. Terrible investments.  It’s hard to sort out good investments from bad when you’re 22 and everyone you know is in debt.  Also overlaps with 3 a lot.
  6. Being 22.

I have a potential solution: hold back most of their salaries.  Pay each athlete the same amount (say, whatever the lowest paid person makes now), and put the rest in a trust, invested in index funds or even bonds.  After they retire, gradually shift more and more of the money into their control.  Here’s why I think this would work:

Status competition is a zero sum game, so nothing is lost if you handicap everyone equally.  3 and 5 are essentially taxes on people knowing you have money, so they go away if you don’t have access to it.    Child support is here to stay, but the current calculation is stupid: it’s based on current income only, which means athletes pay through the nose while they’re working and then need to go to court to get it lowered when they retire.  Income smoothing for the athlete means income smoothing for the child as well, which is ultimately better for them.  And being 22 will definitely be fixed with time.  After retirement, when they’re a little older, a little more experienced with money, and have the time to learn how to invest, they’ll make better choices.  Turning over the money gradually gives them space to learn without a single mistake ruining their lives.

This will slow down their ability to help the people they love.  OTOH, a few years of largesse followed by a return to poverty isn’t very fun for the recipients either.  We’d get fewer “I bought my mom a house” draft stories but also fewer “athlete’s entire extended family facing foreclosure on 9 different houses” retirement stories.

It would be paternalistic for a league to impose this on athletes, but I see no reason a players’ union couldn’t demand it.  There’s precedent for solving player collective action problems with union demands (no one in the NHL wore helmets when they were optional because they reduce visibility and make you look like a worse, but their union demanded they be mandatory).  They might even be able to demand some portion of endorsement money go into the trust

Also potentially useful tactic: focus athletes on what they will do after retirement.  Warning them they probably won’t play that long and money doesn’t last forever doesn’t work because people who believe odds apply to them don’t become professional athletes in the first place.  But “there will be time after football” isn’t an odd, it’s a fact.  If we redirected children and college students to view sports as generating the seed money for their real life goal, they’ll develop more skills and think a little harder about spending money.  Bonus: the 99.99999% of aspiring athletes that don’t become pro athletes will have useful skills to fall back on.

Why not Calories In/Calories Out?

Content warning: fat, diet.

Epistemic status: plausible and interesting.

In Gary Taubes’s latest appearance on EconTalk, he gives an alternate explanation for weight gain.  He dismisses Calories In/Calories Out as equivalent to saying “Bill Gates is rich because he made more money than he spent.” – it’s not actually wrong, but it’s not answering the question in any meaningful way.  He offers the following explanation for a way that could work.  I know enough to know that this explanation is plausible but haven’t looked into the evidence that it actually explains the data.

Insulin is a hormone that signals your cells to take in sugar from the blood stream.  Different cells have different insulin sensitivity; I’d guess that this is to give the most important cells first call on sugar, but I’ve never heard anyone else say that.  It’s possible for things to get out of whack such that your fat cells (which should really have last call on the sugar) become more sensitive than other cells.  So you’re gaining fat even as your more functional cells are on rations.  CICO is still technically true, as you’re not expending very many calories, but it’s unfixable by willpower.  As long as the different sensitivities exist, you can only raise your calories out by taking in many more calories.

None of that is the speculative part.  We can argue about the prevalence and importance, but “cells don’t respond to insulin” is the definition of type 2 diabetes, a thing that definitely happens and is associated with weight gain.  Medical science has always assumed the causality started with fat, but it’s never actually proved it.  The speculative part is Taubes’s explanation that this mismatch is caused by eating sugar, and his solution.  Taube thinks you should get most of your calories in the form of fat, which does not trigger insulin production, so your working cells can get calories before your fat cells gobble them up.  I have a few qualms about this.

  1. Your brain runs on sugar, resorting to protein only in the direst emergencies.
  2. Why aren’t the fat cells releasing fat later?  This is less a qualm than a question, I find it entirely plausible that fat cells reaction to being well fed is not to release fat.

There’s a million weight loss fads (twenty years ago my mom was giving me Lucky Charms because at least it didn’t have fat like ice cream) and the human body is immensely complicated, so even if we knew the mechanism was true I wouldn’t automatically believe his prescriptions were correct.  But it does highlight how useless Calories In/Calories out is.

An Alternate Explanation for Dieting Studies

[Content warning: dieting, weight loss]

Everyone knows every study shows people can’t lose weight and keep it off.  Everyone knows people who say they lost weight and kept if off.  Some of that may be they do not have a sufficiently long time horizon for “kept it off”, but I think something else is going on.

No one joins a university study as their first attempt at weight loss.  The people who join have tried and failed multiple times.  It seems entirely possible that those people can’t lose weight, but some subset of people succeed on their first try.  Tellingly, I mostly hear “I tried everything and only lost weight on the penguin diet” from penguin diet commercials.  In other contexts people only announce what worked for them.  Maybe they don’t want to advertise their previous failures, but it seems at least as likely that their weight loss stemmed from things all diets have (e.g. paying more attention to food, initial progress leading to a virtuous cycle)  and the penguin diet happened to be the one they tried.

This post inspired by listening to Gary Taubes on Econtalk and Traci Mann on Here We Are on the same day.

An Opportunity to Throw Money at the Problem of Medical Science

Last month Sarah Constantin reported on a new potential treatment for sepsis (a life-threatening bacterial infection of the blood), developed by Dr. Paul Marik.  The good news is that the ingredients are all pretty common off-patent vitamins and medications, so if approved it will be really cheap.  I haven’t researched this treatment myself, but Sarah thinks it looks promising, and Sarah Constantin is the autodidact medical researcher I want to be when I grow up (she’s also a friend of mine).  To quote her:

Sepsis is a really big deal. More people die from sepsis every year than from diabetes and COPD combined. Ten thousand people die of sepsis every day.  A lot of these cases are from pneumonia in elderly people, or hospital-acquired infections.  Curing sepsis would put a meaningful dent in the kind of hell that hospital-bound old people experience, that Scott described in Who By Very Slow Decay.

Sepsis is the destructive form of an immune response to infection. Normally the infection is managed with antibiotics, but the immune response still kills 30% of patients.  Corticosteroids, which reduce the immune response, and vitamin C, which reduces blood vessel permeability so that organs are less susceptible to pro-inflammatory signals, can treat the immune response itself.

What evidence do we have for this treatment?  It’s made up of individual ingredients known or suspected to fight sepsis, and in a retrospective study, 0% of Marik’s patients died of sepsis (although 8% died from their underlying illness), compared to half in the ~control group.  But a retrospective study isn’t enough; we need the gold standard, a randomized control study.

The good news is this treatment is made from very common off patent medications, so if approved it will be very cheap.  The bad news is that this treatment will be really cheap, so no there’s no monetary incentive to fund an RCT.  To be clear: this is not the fault of pharmaceutical companies.  No one is holding something back.  They are merely responding to the incentives we have set up.  But if you’d like to change the incentive system we live under, the principal investigator is now attempting to crowdfund an RCT of his treatment.  Donations are handled through Eastern Virginia Medical School and are tax deductible.

My budget for substantial donations for the year is still exhausted by Tostan.  But contributing to a better set of incentives for medical research is worth $20 out of my symbolism budget.  Better incentives here means not just that treatments can be researched even if they aren’t monetizable, but that people like Sarah have an incentive to do this research and share it.*  To that end, if you do decide to donate as a result of Sarah’s post, I’d really appreciate it if you also filled out her donation form so she can see how much she raised (for bonus points note as your immediate referrer so I can see how much I raised).

*”People like Sarah” technically includes me, since this is almost exactly the reasoning Ozy Brennan gave for donating to my favorite charity, Tostan.

Epistemic Spot Check: The Alchemy of Air (Thomas Hager)

[content warning: war, the Holocaust]


Fixed nitrogen is a startlingly important molecule, essential in both explosives and farming. Until the 1900s, turning atmospheric nitrogen (which is abundant) into fixed nitrogen was the purview of a handful of bacteria, and countries went to great length to get more.  Several wars were fought and decided over/by who had better access to nitrogen stores.

In the early 1900s, German scientist Fritz Haber invented (and engineer Carl Bosch industrialized) a process for producing fixed nitrogen.  This changed the world on a number of levels:

  • Removed the nitrogen-induced cap on the human population, which was ~4 billion people.  You know how people say it’s impossible for everyone to eat organic?  This is why.  There is not nearly enough natural fixed nitrogen to feed everyone.
  • Prolonged Germany’s involvement in World War 1 by one to two years, by both increasing the volume of explosives they had access to and by making it possible to feed people from relatively poor farmland.
  • Was part of a larger shift in Germany becoming an economic and scientific power.

The Alchemy of Air starts with a longer description of why fixed nitrogen is so important.  The meat of the book  is the invention of the Haber-Bosch process and the life stories of the two men responsible for it.  It touches on the chemistry of nitrogen, how a proof of concept becomes and industrial process at the age when those were beginning to separate.  At the end, it offers a glimpse into the rise of Hitler and the Nazi party as viewed by the scientific community.

Fact Checking

Claims: “Nitrogen is the most important element… for humans”, “more interesting than other elements.”  “Nitrogen is a/the rate limiting factor in life on Earth.  If you put more fixed nitrogen in a field, you can grow more.” (Prologue).

True-ish. I don’t know how to fact check which element is more interesting.  I went through 7 semesters of college chemistry without picking a favorite element.  But the more factual claim that nitrogen is a major limitation of growth on life on Earth checks out.  The other major elements we need- carbon, oxygen, and hydrogen- are relatively cheap to create from molecules found in the air (although oxygen is the limiting factor in certain aquatic ecosystems- and as you learn at the end of the book, fixed nitrogen abundance makes this worse).    Atmospheric nitrogen makes up 80% of the air, but it is incredibly energetically expensive to convert that into nitrogen useful to plants and animals (known as fixed nitrogen)

Claim: “N2 is [harder to break down because it is] held together with a triple bond, the strongest bond in nature.” (prologue)

True but incomplete. Nitrogen does use a triple bond.  On average, triple bonds will be more expensive to break or form than double or single bonds.  But carbon can form four bonds.  You can’t actually have a stable quadruple bonds because of complicated shape things, but they can triple bond with each other and each have a side chain.  It’s possible HCCH is just as expensive to break apart, but there’s enough carbon in easily accessible forms that it doesn’t matter.

Also, the fact that N2 (the kind of nitrogen found in the atmosphere) is expensive to break doesn’t explain why fixed nitrogen makes such an excellent explosive.  The fact that it is implies that fixed nitrogen is also energetically expensive to make.  The internet is rather lacking on this topic, but the fact that fixation is net negative on ATP (the energy currency of living things) suggests that I’m right.  “This bond stores a lot of energy” is not actually a good argument for why no one breaks it.

Claim: “Using [their complicated farming system involving three different animals and five different types of plants], the Chinese could feed as many as ten people per acre of farmland, a yield of food five to ten times greater than the European average of the 1800s” (p5)

True but misleading. Verifying this is surprisingly hard, but I do know that Chinese agriculture was incredibly labor intensive, much more so than European farming.  That’s why 1800s China has a bunch of proverbs about working hard and Europe had a bunch of proverbs about hoping it rained (source, although I’d like to do a fact check on this one).

Claim: Haber-Bosch uses 1% of the Earth’s energy (p271)

True, although this refers only to generated energy and not natural sources like the sun or underwater vents.

Claim: “Half the nitrogen in your blood, your skin and hair, your proteins and DNA, is synthetic” (p272)

False.  The atom was nitrogen when you found it and it’s nitrogen now.  The molecule that delivered it to the plant was synthetically produced, but the nitrogen has always been itself.  At a minimum, synthetic should mean you found different atoms and combined them into something new, but chemistry has an even stricter definition: elements that do not exist naturally and must be created in a lab.

Claim: “Nitrogen pollution in the water has been to linked to health problems like methemoglobinemia, or “blue baby syndrome”” (p274)

True.  The EPA supports this, although it appears there’s still some scientific controversy over exactly how large a role nitrogen plays.

Claim: Nitrogen run off causes algal blooms that devastate aquatic ecosystems (p274)


Claim: A long history of saltpeter I’m not going to transcribe fact-by-fact (chapter 1)

True.  I didn’t run down every fact but everything I could find checked out, and his conclusions (saltpeter was incredibly valuable) are supported by other information he didn’t mention.

Claim: Darwin was hired onto the Beagle as someone of suitable social stature for the captain to talk to so he didn’t go mad.


Claim: After saltpeter, bird shit became the coveted resource (chapter 3)

True. Again, I didn’t run down every single thing, but guano was the immediate catalyst for the South American colonies to revolt against the Spanish, the USA still has a law on the books allowing any citizen to claim guano rich islands for the country.

Other thoughts

Alchemy of Air is a weirdly uneven book.  I don’t think this is writing style, I think it’s just covering a lot of different material and what people find interesting varies a lot.  For example, I loved the sections on the history and economics of nitrogen, and how the Haber-Bosch industrial process for producing fixed nitrogen from the air affected World War 1.  The fourty three chapters on Bosch taking Haber’s proof of concept to a scalable industrial process?  Do not care.  Almost quit book until I remembered I could just skip them.

The parts on the personal lives of Bosch and Haber were very mixed bag.  Mostly boring, but intricately involved with the extremely interesting things that were happening at the time (~1900 to the rise of the Nazis).  Fritz Haber was a German Jew who merged love of science with love of country in his mind, and converted to Christianity in part so he could be viewed as more fully German.  The Haber-Bosch process probably bought Germany another year in World War 1, probably two.  He played a major role in inventing chemical warfare (Alchemy would have you believe he invented it, but is prone to exaggeration).  You can guess how this ends.  In 1934 he flees the country, made more difficult by the fact that the rest of the world still considers him a German war criminal.  The chemical he invented for use on Allied soldiers in WW1 is adapted for use in the concentration gas chambers in WW2.

Bosch’s life is also complicated.  Between the wars he dedicated everything he had and then some to inventing a way to synthesize gasoline.  This included collaborating with the early Nazi party for funding.  They were happy to do so because they, correctly, anticipated that an internal source of gas would be necessary in the upcoming war.  At some point Bosch realized what he’d done, made a bunch of symbolic gestures against the Nazis, and died in disgrace.  It’s weird because those symbolic gestures probably cost him a lot and accomplished nothing, whereas there’s some chance he could have prevented WW2 and the entire Holocaust by not working quite so hard to create synthetic gasoline.  By the time the Nazis were in power it might have bankrupted his company to stop, but it was still doable.  Maybe someone else would have invented synthetic gas… but Bosch’s company was uniquely well positioned to do so, and he basically willed it into existence by convincing an increasingly large collection of people to toss money at the process.  He didn’t even have to give up, he just had to try less hard on fundraising.

And of course both men have saved/enabled billions of lives by creating the process that feeds them.

I don’t know what to do with this information.  The world is complicated and I want the right thing to be obvious.


Generally reliable, moderately stylized.  I trust the author for broad strokes but not to give me non-nitrogen related nuance.

This post supported by Patreon.