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| Rendering based on electron-microscope data, showing the positions of neurons in a fragment of the brain cortex. Neurons are coloured according to size. (Google Research & Lichtman Lab (Harvard University). Renderings by D. Berger (Harvard University)) | ||||||
A millimetre of brain in spectacular detailResearchers have created an exquisitely detailed atlas of a tiny piece of one woman's brain, which had been removed during surgery to treat her epilepsy. The sample was cut into thousands of nanometre-thick slices and each was imaged with electron microscopes. AI tools then classified different structures and cells, and created a 3D reconstruction of the sample. "I remember this moment, going into the map and looking at one individual synapse from this woman's brain, and then zooming out into these other millions of pixels," says neuroscientist and study co-author Viren Jain. "It felt sort of spiritual." Nature | 4 min readReference: Science paper | ||||||
How a TikTok ban could affect scientistsResearchers who use TikTok to communicate science, study social trends and earn money tell Nature that they are dismayed and frustrated about a looming ban on the app in the United States. TikTok is owned by Beijing-based ByteDance — which, amid growing US–China tensions, faces concerns related to the Chinese government's access to user data. Some scientists worry that the ban would cut off an important route for trustworthy science information to reach teenagers — 63% of whom use the app. Nature | 6 min read | ||||||
Question of the weekLast week, the scientific adviser of 3 Body Problem, a planetary scientist and a nanotechnology expert reviewed the hit Netflix show. Although the mind-bending tale of a group of alien-battling Oxford physicists is of course entirely fictional, it includes some real scientific concepts. Do you think science-fiction series or films should have a scientific adviser?
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An AI scientist goes to WashingtonComputer scientist Kiri Wagstaff temporarily shelved her academic career in applied machine learning to provide advice on artificial intelligence (AI) to US lawmakers. One thing they're watching closely is the European Union's AI Act, which passed in March. A key difference between the legislative environments of the US and the EU, says Wagstaff, is US constitutional protections for freedom of speech. "Take generative AI," she says. "If it offends someone, how much of that do we allow to just be as it is without restrictions? We have to draw that line carefully." Nature | 6 min read | ||||||
Futures: Tashni's first tunnelA shy child gets a helping claw from an alien classmate in the latest short story for Nature's Futures series. Nature | 6 min read | ||||||
How rich is too rich?When the top 1% of people hold as much wealth as the bottom 90%, as in the United States today, is it time to take drastic action and place limits on how rich individuals can be? Economist and philosopher Ingrid Robeyns thinks so — and suggests a cap on wealth of 10 million euros or US dollars per person. As economist Lucas Chancel explains in his review of Robeyns's book, Limitarianism, the concentration of extreme wealth stymies governments' abilities to invest in public goods, such as education, health care and climate-change mitigation. Nature | 5 min read | ||||||
Podcast: Major AlphaFold upgrade"The real revolution was AlphaFold2," Nature reporter Ewen Callaway tells the Nature Podcast. But "it just predicted protein structures, it didn't predict proteins alongside all the other players of the cellular ecosystem", such as DNA. "AlphaFold3 is exactly that." AlphaFold3 is also reportedly easier to use and incredibly fast. Access to the tool, however, is limited — partly to protect the advantage of DeepMind's own drug-discovery spin-off company. Nature Podcast | 21 min listenSubscribe to the Nature Podcast on Apple Podcasts, Spotify or YouTube Music, or use the RSS feed. | ||||||
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Quote of the day"There will be no freedom, no lawfulness, no rights, if we allow climate breakdown to become the catastrophe that is now threatened."Retired minister Sue Parfitt explains why she and retired biology teacher Judy Bruce targeted the Magna Carta at the British Library for a climate protest. The pair — both in their 80s — cracked the document's case with a hammer and chisel, and glued themselves to the display. (Sky News | 2 min read) | ||||||
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What matters in science | View this email in your browser Tuesday 13 February 2024 Hello Nature readers, Today, we discover blood biomarkers that could be early warning signs for dementia, consider China's nationwide audit of retractions and learn about Nobel laureate Katalin Karikó's decades-long fight for recognition. The results of a large-scale screening study could be used to develop blood tests to diagnose diseases such as Alzheimer's long before symptoms take hold. (Vsevolod Zviryk/Science ...
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