Science

Scientists at Harvard have built a miniature device that can twist and tune light in real time. By rotating two stacked photonic crystals and adjusting their spacing with a tiny mechanical system, they can control how light’s “handedness” behaves. This allows the chip to distinguish between left- and right-circular polarized light with remarkable precision. The advance could lead to smarter sensors, faster communications, and new quantum technologies.

A routine quantum optics technique just revealed an extraordinary secret: entangled light can carry incredibly complex topological structures. Researchers found these hidden patterns reach up to 48 dimensions, offering a vast new “alphabet” for encoding quantum information. Unlike previous assumptions, this topology can emerge from a single property of light—orbital angular momentum.

A routine quantum optics technique just revealed an extraordinary secret: entangled light can carry incredibly complex topological structures. Researchers found these hidden patterns reach up to 48 dimensions, offering a vast new “alphabet” for encoding quantum information. Unlike previous assumptions, this topology can emerge from a single property of light—orbital angular momentum.

On Tuesday, CERN will transport antiprotons on a truck for the first time, testing the plan to deliver antimatter by road to research labs across Europe

In an incredibly lucky cosmic accident, NASA’s Hubble Space Telescope captured a comet breaking apart in real time—something astronomers have long tried and failed to observe. The comet, C/2025 K1 (ATLAS), wasn’t even the original target, but when researchers pivoted to it, they unknowingly caught it mid-disintegration into multiple pieces.

You just established a settlement on an Earth-like planetary body far from our solar system. You did your evening chores after eating dinner, and you want to go out for the evening view, which consists of two setting stars, reminiscent of the infamous scene in Star Wars. However, there’s one major difference: a large planetary body is in the sky. As you were aware before arriving, you’re on an exomoon orbiting a Saturn-sized exoplanet, both of which orbits two stars.

Astronomers have found the first case of a brown dwarf binary pair experiencing mass transfer. The pair are very close to one another, with an orbital period of only 57 minutes. The pair will eventually merge into one, brighter star, or the accretor will become massive enough to trigger fusion. At only 1,000 light-years away, the system is a strong candidate for more detailed, follow-up observations.

Super-puff planets have extremely low densities, and exoplanet scientists aren't sure why. They seem to defy our understanding of how planets form. Researchers used the JWST to observe the atmosphere of Kepler-51d, one of the puffiest of the super-puffs. Unfortunately, even the powerful space telescope found a featureless spectrum. What does it mean?

Astronomers have found a 710-metre-wide asteroid that spins once every 1.9 minutes, so fast that it should have spun itself apart

Over at The Philosopher’s Magazine, Alex Byrne (a professor at MIT who works in part on gender and sex), has written a tale of rejection that’s both amusing (in how it’s written) and depressing (in what it says).

Alex was invited to write a book review for Notre Dame Philosophical Reviews, an online site that publishes only reviews of philosophy books. Because reviews are invited (sometimes after a prospective reviewer offers to write one), they are rarely if ever rejected.

But not so with Byrne. Because he wrote a critical but not nasty review of a book on gender by a trans-identified male, Alex’s contribution was rejected—without the site even giving him an explanation.

Click the screenshot below to read Alex’s sad tale. Actually, it’s not really sad because his review will be published elsewhere, and this rejection does him no profesional damage.  But the way he was treated reflects yet another academic taboo like the one I discussed in the last post. In this case, the taboo involves saying anything critical about gender science or, in this case, philosophy, particularly about a book written by a trans person.

Some excerpts:

last October, I saw that Rach Cosker-Rowland’s Gender Identity: What It Is and Why It Matters had just come out with Oxford University Press. “Philosophically powerful,” “excellent, important, and timely,” and “fascinating, well-argued,” according to blurbs from well-known philosophers who work in this area. Timely, for sure. I thought reviewing Cosker-Rowland’s effort myself would be worthwhile, since I’ve written extensively on gender identity, in my 2023 book Trouble with Gender and other places.

Many readers will be aware that the topic of sex and gender has not showcased philosophers on their best behavior. It is almost ten years since Rebecca Tuvel was dogpiled by colleagues for writing about transracialism, and—incredibly—things went downhill from there. Dissenters from mainstream thought in feminist philosophy have been subjected to name-calling, no-platforming and other extraordinarily unprofessional tactics. As a minor player in this drama, I have had OUP renege on a contracted book and an invited OUP handbook chapter on pronouns rejected. My recent involvement in the Health and Human Services review of treatment for pediatric gender dysphoria has done little for my popularity among some philosophers.

I was not hopeful, then, that an invitation to review Cosker-Rowland’s book would spontaneously arrive. But NDPR welcomes “proposals for reviews from suitably qualified reviewers” (see above), and I had reviewed three times for them before. So, I emailed the managing editor in October. I was pleasantly surprised when Kirsten Anderson wrote back to me in December, “Good news! After consulting with the board about it, we’ve decided to move forward with your review.” OUP and NDPR were keen to get the book to me—I received a hard copy from both, and OUP also sent a digital version.

By mid-January I had finished, and sent the review to Anderson with the following note:

Review attached. It’s a big and complicated book but mindful of your guidelines I tried to keep the main text as short as I could—it’s a little over 2200 words. However, the review is very critical, and (again mindful of your guidelines) I need to give reasons for the negative evaluation, so I put a lot of the supporting evidence in the lengthy endnotes.

To which she replied:

Thanks for the review and the extra explanation! Your review will now go through the standard process, starting with being vetted by a board member covering the relevant area. If the length is a problem, I’ll let the board member weigh in along with any other revision requests that may arise. Otherwise, it’ll go straight to copyediting. After that, it’ll be published.

As I said, Alex’s review was not nasty but it was critical (there’s a link below), and he found a number of simple errors that Cosker-Rowland made. Here’s one:

I kept it clean and the overall tone was well within the Overton window for philosophy book reviews, which (as noted at the beginning) is wide. Terrible arguments in philosophy are common; more remarkable was Gender Identity’s slapdash scholarship and glaring factual mistakes. Here’s one example (from the review’s lengthy endnotes):

Gender Identity would have greatly benefited from fact checking. One particularly egregious error is the allegation that “in March 2023 there was a rally outside the Victorian Parliament in Melbourne at which neo-Nazis and gender critical feminists campaigned against trans rights and held up banners proclaiming that trans women are perverts and paedophiles” (158). The two groups did not campaign together and the feminists held up no such banners. The feminists’ rally, including banners and placards, can be seen in one of Cosker-Rowland’s own citations, Keen 2023. Cosker-Rowland even manages to misdescribe the neo-Nazis: their sole banner read “Destroy Paedo Freaks” (Deeming v Pesutto 2024: para. 100); although hardly well-disposed towards transgender people, whether the neo-Nazis meant to accuse them of pedophilia is not clear (para. 114).

I documented some other obvious errors and scholarly lapses in the review—by no means all the ones I noticed. “OUP should note,” I wrote, “that quality control in this area of philosophy is not working.”

Let’s reflect on Cosker-Rowland’s claim about the Melbourne rally for a moment. As a footnote in Gender Identity confirms, she knows that the gender-critical philosopher Holly Lawford-Smith was at the event. Cosker-Rowland believes, then, that Lawford-Smith, a philosophy professor employed by Melbourne University and an OUP author, is happy to attend—indeed, speak at—a rally at which fellow-feminists joined forces with neo-Nazis, both holding grotesque banners about trans women and pedophilia. Perhaps Lawford-Smith waved one of these banners herself! No one with a minimal hold on reality would find this remotely credible. Even more astounding is how this managed to get by the OUP editor and multiple referees—it’s not buried in a footnote, but is in the main text.

He found other errors that he didn’t mention in the review but gives in this piece (you can see his entire review here, in Philosophy & Public Affairs). Here’s Byrne’s summing up given in the last two sentences of his review:

Back in the day, we knew what it was to be transsexual. Transsexuality’s contemporary descendant, being transgender, is decidedly more nebulous and deserves an explanation. Gender identity as Cosker-Rowland conceives of it is of no help, and neither is obstetrical paperwork.

Some weeks after submitting the review to Notre Dame Philosophical Reviews, Byrne got a rejection that said only that the journal site was “not moving forward” with publication. No reasons were given. Alex wrote back to the editor asking if they would be so kind as to answer two questions:

1. Who was the board member who initially vetted my review? This is not blind reviewing, I take it. The board member knew who wrote the review. Seems only fair that I should know the identity of the board member. If the board member had reasonable concerns, then there should be no objection to making everything transparent.

2. What, exactly, was the reason why you have decided not to publish the review?

Well, reviewers aren’t always entitled to the names of those who vetted a review, but certainly reasons should be given for a rejection.  None were, except that one board member declined to vet Alex’s piece and the other “recommended strongly that it be rejected outright.” That was the only feedback he got. Byrne isn’t moaning about this, but his essay does have a serious point about the infection of the publication process in his field by ideology:

The philosophy profession has shown itself to be an institution of fragile integrity when put to the test. One can only hope spines will eventually stiffen, and academic law and order is restored. Meantime, we cannot solely rely on the fortitude of Philosophy & Public Affairs. I suggest that the Journal of Controversial Ideas starts publishing book reviews.

Amen!

A pig's brain has been frozen with its cellular activity locked in place and minimal damage. Some believe the same could be done with the brains of people with a terminal illness, so their mind can be reconstructed and they can "continue with their life"

My friend the Belgian philosopher Maarten Boudry is writing about what he calls, correctly, “the most dangerous idea in academia”—an idea that can get you banned or even fired if you even suggest it. It is, of course, the notion that different “races” differ on average in IQ or intelligence. It’s such a hot potato that many people think that research looking for any differences should be banned or strongly discouraged. (This, of course, is because any potential outcome save exact equality among groups is said to inevitably cause racism and bigotry.)

I’ll leave aside here the idea of what “races” are, for Luana and I explained our take in our Skeptical Inquirer paper “The Ideological Subversion of Biology.”  We can use instead either the notion of “self-defined races” (the boxes one ticks on a form) or, as Luana and I wrote, human populations:

Before we handle this hot potato, we emphasize that we prefer the words ethnicity or even geographic populations to race, because the last term, due to its historical association with racism, has simply become too polarizing. Further, old racial designations such as white, black, and Asian came with the erroneous view that races are easily distinguished by a few traits, are geographically delimited, and have substantial genetic differences. In fact, the human species today comprises geographically continuous groups that have only small to modest differences in the frequencies of genetic variants, and there are groups within groups: potentially an unlimited number of “races.” Still, human populations do show genetic differences from place to place, and those small differences, summed over thousands of genes, add up to substantial and often diagnostic differences between populations.

We discuss some differences between populations and self-diagnosed “races” that are known. There are also known differences in IQ, but the taboo question is whether any of those difference reside in the genes. On this subject I, like Maarten, am agnostic, as I simply don’t know the literature well enough (and am not sufficiently interested in it) to form an opinion.

Click on the screenshot below to read Maarten’s take:

Maarten was impelled to write the piece because one of his colleagues at Ghent University, Nathan Cofnas, is in big trouble because he’s promoted the most inflammatory version of The Forbidden Question: that a substantial portion of the differences in IQ between American blacks and whites (a phenotypic difference of about 15 points) is genetic:

My guest Han van der Maas, a renowned intelligence researcher at the University of Amsterdam, explained that individual IQ differences are highly heritable, but that he does not believe in differences between ethnic groups. His statistical and methodological arguments (e.g. Simpson’s paradox) convinced me at the time. Still, he hedged his bets: future evidence might yet reveal such differences, and we should not try to cancel researchers who claim such differences are real.

Forty-five colleagues from my former philosophy department (and hundreds more in a letter to the rector) clearly think otherwise. They are urging the rector to fire Nathan Cofnas because he claims that the IQ gap between racial groups such as whites and blacks in the US—differences that are themselves well documented—have largely genetic causes, rather than environmental ones like socio-economic disadvantage or discrimination. He makes the same claim about the higher scores of East Asians and Jews (which exceed those of white Europeans, by the way). They dismiss all of this as “pseudoscience and racism.”

The question is whether Cofnas should be fired for his claim, and whether the research supposedly supporting it should be banned.  I would argue that the answer to both questions is “no”, but researchers have to be very careful and sensitive in pursuing it.  Maarten quotes the paper by Luana and me about this (his words indented, ours doubly indented):

Now, I perfectly understand why many people are shocked by Cofnas’s claims, and I agree that such hypotheses should be treated with utmost caution. As my friend Jerry Coyne wrote with Luana Maroja in their influential article The Ideological Subversion of Biology:

In light of the checkered history of this work, it behooves any researcher to tread lightly, for virtually any outcome save worldwide identity of populations could be used to buttress bias and bigotry.

Still, this clearly falls within the scope of academic freedom. If you are not prepared to extend academic freedom to ideas you fiercely disagree with, you do not really believe in academic freedom.

In light of calls for Cofnas’s firing, a number of people have signed an open letter defending Cofnas’s right to study this topic (or any reasonable topic); the letter is at the link below:

My colleagues Peter Singer, Francesca Minerva and Jeff McMahan wrote an open letter defending the academic freedom of Nathan Cofnas. I have signed it as well, together with luminaries such as Steven Pinker, Alan Sokal , Susan Blackmore, Scott Aaronson, and Bryan Caplan. Here it is in full:

And the letter, which is short:

A statement in support of Nathan Cofnas’s Right to Academic Freedom of Expression

Two separate statements have recently been issued by members of Ghent University, in Belgium, calling on the university to rescind the appointment of Nathan Cofnas as a postdoctoral researcher. One claims that his views “violate the university’s code of ethics and are morally beneath contempt”.

We oppose this attack on academic freedom. While we are not endorsing any specific claims Cofnas has made, we believe that academics must be able to put forward controversial or provocative claims without fear of losing their employment. Of course, other academics should be free to criticise or repudiate those claims.

The statements mentioned above do not even attempt to engage with Cofnas’s empirical claims. Disagreements, whether about empirical claims, ethical principles, or the interpretation of the ethical code of a university, should be settled through free inquiry and open, civil discussion.

We commend Petra De Sutter, Rector of Ghent University, for her statement to the Belgian newspaper De Morgen, that “As a university, we have a responsibility to create space for debate, but also to ensure an environment where people feel heard and respected.”

We agree that creating space for debate is an essential element of a university, and that space for debate should not be closed unless this is a last resort to prevent a clear threat of lasting substantial harm.

Note that the letter takes no position on the data itself; it’s a letter about whether Cofnas should be granted academic freedom to do his work.  As Maarten himself says, “As most of the signatories, I do not endorse Nathan Cofnas’s claims and remain agnostic on the issue.”  Luana and I, along with 145 other academics, signed this letter, with some signers named above.

It’s a sign of the ideologically-infused and chilling atmosphere in biology that one has to think for even a second before agreeing with the letter.  Now you might think that finding genetically-based IQ differences betwen populations might cause “a clear threat of lasting substantial harm,” but for reasons outlined in our paper, Luana and I don’t agree.  There are potential upsides in such data, just as there are potential upsides in looking at interpopulation data on medical conditions (the goal is to help individuals, not to demonize one group or another). After all, we don’t even know how the data will come out.

And it’s not at all clear whether finding out that an interpopulation difference has genetic causes will lead to increased bigotry. Since genetic contributions to being gay have been found, prejudice against gays has decreased, not increased. If you reject free will and accept determinism due to genes, physics, and one’s environment, one might see genetically-based differences as “forgiving,” for you cannot be blamed for the genes you get from your parents and that reflect long evolutionary histories.

Maarten goes on to show the difference in long-distance running abilities between Ethiopians and Kenyans on one hand and the rest of the world on the other (these are population differences rather than differences between the classically-defined “races”.  Though I don’t know whether there have been tests to show that these differences are genetic (potential studies could include adoption at birth, rearing in different environments, and so on), I would be willing to bet that they are. But, as Maarten says, “measuring intelligence is far more complicated than crossing a finish line.”

Boudry adds that Cofnas has sometimes been brusque in his public pronouncements about his work, but this is not uncommon among academics:

Finally, what about Nathan Cofnas’s vigorous activism alongside his academic work? It is true that Cofnas is far less measured in his Substack posts than in his academic publications on IQ. For instance, his flippant way of expressing a statistical point about the racial IQ gap in academic achievement (similar to the point above about long-distance running) seems almost deliberately incendiary:

Under a colorblind system that judged applicants only by academic qualifications, blacks would make up 0.7% of Harvard students. […] In a meritocracy, Harvard faculty would be recruited from the best of the best students, which means the number of black professors would approach 0%.

Cofnas is also very combative in his attacks on “woke ideology”, and he genuinely believes only a “hereditarian revolution” can truly dismantle it—otherwise, we’ll be stuck fighting symptoms rather than root causes:

Until we defeat the taboo on hereditarianism, our victories will always be temporary. Every time we cut off a tentacle of the DEI monster, it will grow back.

I’m not convinced, but it’s a clever argument, and I’d encourage you to check it out with an open mind.

Finally, Maarten points out one harmful side effect of demonizing people for the kind of work they do in academia:

Calling for the dismissal of anyone who even touches the third rail of ethnic differences in IQ is also strategically unwise. Such attempts often fuel the phenomenon of “red-pilling.” When academics appear determined to suppress a dangerous idea at all costs, people naturally become suspicious: What are they trying to hide? The result is a further erosion of trust in academia.

And that is not just a made-up reason. When the public perceives scientists to be espousing a political or ideological cause in their research, their view of science is eroded. Have a look at this paper showing that when the journal Nature, in a first, endorsed a political candidate (Joe Biden) for U.S. President in 2020, it reduced the public trust not just in the journal, but in scientists themselves.

Do weigh in below, and because the issue is a sensitive one, you might want to answer this poll.

Note: There is a poll embedded within this post, please visit the site to participate in this post's poll.

Apophis will be visited by multiple spacecraft – including landers – when it skims past Earth in three years

The Jesus and Mo artist has recycled an old strip for Lent, which goes from Feb. 18 through April 2. The caption is this:

Friday Flashback – because we’re in the middle of Lent. You didn’t forget, did you? Heathens!

Mo shows here that he has at least a tad of a sense of humor.

Space weather is a fascinating subject, but one we still have a lot to learn about. One of the main components of it is the active regions (ARs) of the Sun. These huge concentrations of magnetic fields show up throughout the Sun’s photosphere and are the primary source of solar flares and coronal mass ejections (CMEs). They can be simple pairings of magnetic flux or huge, magnetically complex tangles that spend weeks creating massive solar storms before dissipating. But tracking the longest lived of these ARs has been a headache for solar physicists, and a recent paper by Emily Mason and Kara Kniezewski, published in The Astrophysical Journal, both dives into this tracking problem and uncovers some interesting features of the Sun’s most persistent ARs.

A mysterious spike of platinum buried deep in Greenland’s ice has long fueled theories of a catastrophic comet or asteroid strike 12,800 years ago—possibly triggering a sudden return to icy conditions known as the Younger Dryas. But new research points to a far less dramatic, yet still powerful culprit: volcanic eruptions. Scientists found the platinum signal doesn’t match space debris and actually appeared decades after the cooling began, ruling out an impact as the trigger.

We know that a person’s outlook can have a huge effect on their health, and it’s no different when it comes to ageing. Columnist Graham Lawton looks at new evidence of just how powerful our attitude is – and how to use it to age better

A nearby galaxy is behaving strangely—and now scientists know why. The Small Magellanic Cloud’s stars move in chaotic patterns because it slammed into its larger neighbor millions of years ago. That collision disrupted its structure and even created the illusion that its gas was rotating. The discovery means this once “textbook” galaxy may not be as typical as astronomers believed.

Researchers have created a cutting-edge catalyst that turns CO2 into methanol more efficiently than ever before. Instead of using clumps of metal atoms, they engineered a system where each single indium atom actively drives the reaction. This dramatically reduces energy needs while making the process easier to study and optimize. The result could accelerate the shift toward cleaner fuels and sustainable chemical production.

While normal people don't want any child to suffer or die because their parents were tricked by disinformation, the leaders of the anti-vaccine movement, who profit by lying about vaccines, don't care at all.

The post Vaccines Work. Here’s Why We Care About Your Unvaccinated Child. first appeared on Science-Based Medicine.