This article is the result of a rather long journey in science communication, and I think carries some important lessons for science communicators, skeptics, and anyone interested in this topic. What is the technical scientific definition of the term “biological sex”? I have to say I went into this discussion naively thinking that this question would be easy to resolve, and would serve as a good basis of common ground from which to discuss more complex related topics, specifically the trans phenomenon. This is a topic that divides popular skeptics and science communicators, and I am always fascinated and drawn to such controversies. They seem like fertile territory to deepen my understanding of complex topics, and hopefully to contribute to the conversation.

I soon learned that there were two fairly entrenched perspectives on this question. Jerry Coyne, Richard Dawkins and others were claiming that sex (whether an organism is male or female) is determined entirely by gamete size, with males having small gametes and females large gametes (a property known as anisogamy). I and others favor the multidimensional definition of biological sex – that it includes and is defined by the entire spectrum of biological sexual differences – chromosomes and genes, gonads, gametes, hormones, reproductive organs, genitals, and all secondary sexual characteristics. I admit and can see now that I assumed this was “the” scientific definition of sex. It was the definition I learned in medical school in the 1980s, and pretty much the only definition I encountered throughout my medical career. I was therefore somewhat surprised when I received push back from other science communicators that this was not “the” definition, even being accused of trying to change the definition to suit my needs, and of engaging in pseudoscience.

It seemed to me that these two schools of thought on sex were primarily determined by political ideology, and I still think that is playing a significant role. This is especially true among non-biologists, who mostly just accept the definition that fits their political opinions. This also allows for both sides to claim that science is on their side, and the other side is engaging in pseudoscience and allowing their politics to influence their scientific reasoning. This is pretty much where things sit – two entrenched sides largely talking past each other. This is not a good look for a group that identifies as skeptics and presumes to communicate science to the public.

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A recent article in the New York Times is, unfortunately, terrible journalism that ends up shilling for a fraudulent and exploitative industry. The author, Sarah Wildman, tells of her previous encounter with a medium through her unnamed cousin. Part of the subject was Wildman’s 14 year-old daughter who had died the year before. This is a massive conflict that compromises her objectivity. No editor should have let this article go through. Wildman herself admits. “Also, I did not really want to debunk it.” She wanted to believe – that makes her a vulnerable target, not an objective journalist.

The essence of the article is that it really doesn’t matter if mediums are genuine or not. They allow people to feel a connection to their deceased loved-ones, and there is research evidence that such a feeling of connection can be emotionally useful. But the research she cites is about people remembering their loved-ones, thinking about them, looking at pictures and videos, etc. It is not about receiving messages from them through mediums. There is some research looking specifically at mediums, but it is all non-controlled and retrospective (this is exploratory preliminary research). What this research also shows is that feeling comfort from a medium is largely dependent on believing that the communication is real – you have to believe that the mediums are genuinely psychic. And that is a huge problem.

I would therefore challenge Wildman’s core conclusion, that mediums are necessarily or uniquely helpful. People can be assisted in their bereavement through other means that do not involve giving money to an industry built on grift and exploitation. There are also methods that do not require people to believe in things that are not real. In fact, people who seek mediums often feel shame for doing so, and hide what they have done for fear of being dismissed. Wildman blames scientists and skeptics for this. She wrote:

“The study of these occurrences and their impact on grief has long been prejudiced by exactly what you’d expect: the surety of scientists and skeptics that all of it — mediums, sensations, signs — might be about as real as a dime-store Ouija board, a 19th-century séance or, worse, a momentary psychotic episode.”

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I am back from an almost three week trip to LA, Sydney and Christchurch. Sorry I did not have time to keep up with my blog over that period – in which we recorded four live SGU shows, produced three days of conference content, put on two stage shows, and hosted several other events. It was a tremendous amount of fun, but also a great deal of work. I am now jet-lagged and fighting off the remains of a viral infection I picked up along the way.

Such trips always reinvigorate my dedication to science communication and scientific skepticism. I appreciate every conference-goer who came up to tell me about their personal journey and the role the content I have helped produce had played in it. I thought I would share some further observations from the trip.

First, while the skeptical movement, such as it is, has been through a lot, it is still alive and well. The crowds we are able to attract to these events remain robust, and in fact are larger than many past events. There is a lot of enthusiasm for science and critical thinking. There is also a deep hunger for developing the skills to navigate our increasingly complex world. How do we deal with what social media, growing misinformation, deep fakes, and now artificial intelligence has wrought?

People also have a deep desire for community – the kind of community that comes from getting physically together for a shared purpose, not just online.  The number of people we can reach in these physical conferences and meetings is much smaller than online, but I think it remains a critical complement to online content. It also reinforces what I think many of use have learned from the “social media” phenomenon. Online communities are not the same as in-person communities, just online. People interact differently in person and online. The dynamics of social media were simply not what many of us expected. I don’t think we should abandon social media (although I know people who make a reasonable argument that we should), but rather we need to have a more realistic view of its strengths and weaknesses, its vulnerabilities and psychological effects.  Continue Reading »

This post is only partly about uranium, but mostly about motivated reasoning – our ability to harness our reasoning power not to arrive at the most likely answer, but to support the answer we want to be true. But let’s chat about uranium for a bit. In the comments to my recent article on a renewable grid, once commenter referred to a blog post on skeptical science and quoted:

“Abbott 2012, linked in the OP, lists about 13 reasons why nuclear will never be capable of generating a significant amount of power. Nuclear supporters have never addressed these issues. To me, the most important issue is there is not enough uranium to generate more than about 5% of all power.”

This is the flip side, I think, to the misinformation about renewable energy I was discussing in that post. Let me way, I don’t think there is an objective right answer here, but my personal view is that the pathway to net zero that emits the least amount of carbon includes nuclear energy, a view that is in line with the IPCC. There is, however, still a lot of anti-nuclear bias out there, just as their is pro-fossil fuel bias, and pro-renewable bias, and every kind of bias. If you want to make a case for any particular source of power, there are enough variables to play with that you can make a case. However, factual misstatements are different – we should at least be arguing from the same set of verified facts. So let’s address the question – how much uranium is there.

There is no objective answer to this question. Why not? Because it depends on your definition. Most estimates of how much uranium there is in the world, in the context of how much is available for nuclear power, do not include every atom of uranium. They generally take several approaches – how much is in current usable stockpiles, how much is being produced by active mines, and how much is “commercially” available. That last category depend on where you draw the line, which depends on the current price of uranium as well as the value of the energy it produces. If, for example, we decided to price the cost of emitting carbon from energy production, the value of uranium would suddenly increase. It also depends on the technology to extract and refine uranium. The value of uranium is also determined by the efficiency of reactors.

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Engaging on social media to discuss pseudoscience can be exhausting, and make one weep for humanity. I have to keep reminding myself that what I am seeing is not necessarily representative. The loudest and most extreme voices tend to get amplified, and people don’t generally make videos just to say they agree with the mainstream view on something. There is massive selection bias. But still, to some extent social media does both reflect the culture and also influence it. So I like to not only address specific pieces of nonsense I find but also to look for patterns, patterns of claims and also of thought or narratives.

Especially on TikTok but also on YouTube and other platforms, one very common narrative that I have seen amounts to denying history, often replacing it with a different story entirely. At the extreme the narrative is – “everything you think you know about history if wrong.” Often this is framed as – “every you have been told about history is a lie.” Why are so many people, especially young people, apparently susceptible to this narrative? That’s a hard question to research, but we have some clues. I wrote recently about the Moon Landing hoax. Belief in this conspiracy in the US has increased over the last 20 years. This may be simply due to social media, but also correlates with the fact that people who were alive during Apollo are dying off.

Another factor driving this phenomenon is pseudoexperts, who also can use social media to get their message out. Among them are people like Graham Hancock, who presents himself as an expert in ancient history but actually is just a crank. He has plenty of factoids in his head, but has no formal training in archaeology and is the epitome of a crank – usually a smart person but with outlandish ideas and never checks his ideas with actual experts, so they slowly drift off into fantasy land. The chief feature of such cranks is a lack of proper humility, even overwhelming hubris. They casually believe that they are smarter that the world’s experts in a field, and based on nothing but their smarts can dismiss decades or even centuries of scholarship.

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As human civilization spreads into every corner of the world, human and animal territories are butting up against each other more intensely. This often doesn’t end well for the animals. This is also causing evolutionary pressures that are adapting some species to living in close proximity to humans.

Humans cause significant changes to the environment – we may, for example, clear forests in order to plant crops. We also convert a lot of land to human living spaces. We alter the ecosystem with lots of light pollution. We are also now warming the planet.

Humans also produce a lot of food and along with it a lot of food waste. One of the common rules of evolution is that if a resource exists, something will adapt to exploit it. Perhaps the most versatile species in terms of adapting to human sources of food is rats. They follow humans everywhere we go, and prosper in our shadow. New York city experiencing this phenomenon first hand – there is basically no effective way to deal with the rat problem in the city as long as they have a waste problem. They will need to significantly reduce the availability of food waste if they want to make any dent in the rat population.

There is another way that humans provide a selective pressure on the animals that live close to us – we kill aggressive animals. A recent study shows this effect in a population of brown bears that live in Italy, close to humans. This isolated population has become its own genetic subpopulation of brown bears with distinctive features, including a genetic profile associated with less aggressiveness. Make no mistake, these are still wild animals, and brown bears are a dangerous animal. But they are less aggressive than other brown bears.

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This is not really anything new, but it is taking on a new scope. The WSJ recently wrote about The Rise of ‘Conspiracy Physics’ (hat tip to “Quasiparticular” for pointing to this in the topic suggestions), which discusses the popularity of social media influencers who claim there is a vast conspiracy among academic physicists. Back in the before time (pre world wide web), if you were a crank – someone who thinks they understand science better than they do and that they have revolutionized science without ever checking their ideas with actual experts – you would likely mail your manifesto to random academics hoping to get their attention. The academics would almost universally take the hundreds of pages full of mostly nonsense and place it in the circular file, unread. I myself have received several of these (although I usually did read them, at least in part, for skeptical fodder).

With the web, cranks had another outlet. They could post their manifesto on a homemade web page and try to get attention there. The classic example of this was the “Time Cube” – the site is now inactive but you can see a capture on the wayback machine. This site came to typify the typical format of such pages – a long vertical scrawl, almost unreadable color scheme, filled with boasting about how brilliant the creator is, and claiming a conspiracy of silence among scientists.

With web 2.0 and social media, the cranks adapted, and they have continued to adapt as social media and society evolves. Today, as pointed out in the WSJ article, there is a wave of anti-establishment sentiment, and the cranks are riding this wave. If you read the comments to the WSJ article you will see evidence of some of the contributing factors. There is, for example, a lot of “blame the victim” sentiment – blaming physicists, or scientists, academics, experts in general. They did not do a good enough job of explaining their field to the public. They ignored the cranks and let them flourish. They responded to the cranks and gave them attention. They are too closed to fringe ideas that challenge their authority.

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Avi Loeb is at it again. He is the Harvard astrophysicist who first gained notoriety when he hypothesized that Oumuamua, the first detected interstellar object, might be an alien artifact. His arguments were pretty thin, not taken very seriously by the scientific community, and mostly did not pan out. However, Oumuamua has left the solar system and so any unanswered questions will remain forever unanswered. But Loeb has been riding his fame and his alien artifact narrative ever since, founding the Galileo Project dedicated to looking for alien technological artifacts. Recently, NASA discovered the third every interstellar object, and the first interstellar comet, 3I/ATLAS. (“3I” is simply the nomenclature for the third interstellar object, and “ATLAS” for the Asteroid Terrestrial-impact Last Alert System that made the discovery.) Loeb recently published a paper and is blogging that this too shows “anomalies” deserving of exploring the ET technology hypothesis. And again – I am not impressed.

Let me jump ahead a bit and say up front – I am not against exploring the alien hypothesis, pretty much in any context. Even though the probability may be low, the payoff would be huge, and it’s worth a consideration. I am not against looking for alien technological signatures. This may, in fact, be the best method for detecting an alien technological civilization. I also think that serious academics and scientists should be taking such efforts seriously and there should be no academic shame in engaging in them. So I am with Loeb to that extent.

What bothers me about Loeb is that his arguments are so terrible. He is just another classic example of an academic and scientist who has no apparent experience with scientific skepticism and therefore is falling for common pitfalls. He also appears to not have learned anything in the last seven years, which is greatly disappointing. In fact, I would argue that he is hurting his stated greater cause (with which I largely agree), to make searching for alien technology academically respectable. Loeb is essentially engaging in anomaly hunting, and shows no signs of understanding what that means. Let’s take a look at his latest list of apparent “anomalies” to see what I mean.

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One potentially positive outcome from the COVID pandemic is that it was a wakeup call – if there was any doubt previously about the fact that we all live in one giant interconnected world, it should not have survived the recent pandemic. This is particularly true when it comes to infectious disease. A bug that breaks out on the other side of the world can make its way to your country, your home, and cause havoc. It’s also not just about the spread of infectious organisms, but the breeding of these organisms.

One source of infectious agents is zoonotic spillover, where viruses, for example, can jump from an animal reservoir to a human. So the policies in place in any country to reduce the chance of this happening affect the world. The same is true of policies for laboratories studying potentially infectious agents.

It’s also important to remember that infectious agents are not static – they evolve. They can evolve even within a single host as they replicate, and they can evolve as they jump from person to person and replicate some more. The more bugs are allows to replicate, the greater the probability that new mutations will allow them to become more infectious, or more deadly, or more resistant to treatment. Resistance to treatment is especially critical, and is more likely to happen in people who are partially treated. Give someone an antibiotic to kill 99.9% of the bacteria that’s infecting them, but stop before the infection is completely wiped out, and then the surviving bacteria can resume replication. Those surviving bacteria are likely to be the most resistant bugs to the antibiotic. Bacteria can also swap antibiotic resistant genes, and build up increasing resistance.

In short, controlling infectious agents is a world-wide problem, and it requires a world-wide response. Not only is this a humanitarian effort, it is in our own best self-interest. The rest of the world is a breeding ground for bugs that will come to our shores. This is why we really need an organization, funded by the most wealthy nations, to help establish, fund, and enforce good policies when it comes to identifying, treating, and preventing infectious illness. This includes vaccination programs, sanitation, disease outbreak monitoring, drug treatment programs, and supportive care programs (like nutrition). We would also benefit from programs that target specific hotspots of infectious disease in poor countries that do not have the resources to adequately deal with them, like HIV in sub-Saharan Africa, and tuberculosis in Bangladesh.

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It’s probably not a surprise that a blog author dedicated to critical thinking and neuroscience feels that misinformation is one of the most significant threats to society, but I really to think this. Misinformation (false, misleading, or erroneous information) and disinformation (deliberately misleading information) have the ability to cause a disconnect between the public and reality. In a democracy this severs the feedback loop between voters and their representatives. In an authoritarian government it a tool of control and repression. In either case citizens cannot freely choose their representatives. This is also the problem with extreme jerrymandering – in which politicians choose their voters rather than the other way around.

Misinformation and disinformation have always existed in human society, and it is an interesting question whether or not they have increased recently and to what extent social media has amplified them. Regardless, it is useful to understand what factors contribute to susceptibility to misinformation in order to make people more resilient to it. We all benefit if the typical citizen has the ability to discern reality and identify fake news when they see it.

There has been a lot of research on this question over the years, and I have discussed it often, but it’s always useful to try to gather together years of research into a single systematic review and/or meta-analysis. It’s possible I and others may be selectively choosing or remembering parts of the research to reinforce a particular view – a problem that can be solved with a thorough analysis of all existing data. And of course I must point out that such reviews are subject to their own selection bias, but if properly done such bias should be minimal. The best case scenario is for there to be multiple systematic reviews, so I can get a sense of the consensus of those reviews, spreading out bias as much as possible in the hopes it will average out in the end.

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