Quanta Magazine

Cold fusion: Now there’s an idea I hadn’t thought about in a while. It came back onto my radar in spring 2026. I had written an article on how scientists tend to be risk averse, and Huw Price, a philosopher at Trinity College at the University of Cambridge, responded to it on Bluesky, citing a paper he’d recently co-authored on attitudes toward cold fusion. He thinks scientists have been overly… Source

You might imagine space to be empty. But the seeming void contains a barely perceptible fog of hydrogen and other neutral atoms. In 2020, NASA’s New Horizons spacecraft, having passed the orbit of Pluto, measured a proxy for the amount of hydrogen around it. In the area between stars in our galaxy — the “interstellar medium,” or ISM — New Horizons found around 130 hydrogen atoms per liter of space. Source

Black holes are one of the universe’s most exotic and elusive objects. When nothing, not even light, can escape their powerful gravitational grasp, taking a picture of one seems unimaginable. But an image of a black hole, or more accurately its shadow, could offer insights that theory alone may not provide when testing predictions. So how can it be done? Harvard astrophysicist Shep Doeleman and… Source

A spider, when knocked off a wall, doesn’t fall for long. Within milliseconds, it spins a soup of proteins into sturdy climbing gear. Using a thin, shimmering strand of silk, the spider hauls itself back up. The strand is tougher than Kevlar, the synthetic fiber in bike tires and bulletproof vests, and stronger than steel. It’s flexible and biocompatible with human bodies. Source

Mathematically speaking, democracy is next to impossible. That may sound like the premise of a Silicon Valley billionaire’s six-hour podcast, but it’s actually a statement about a remarkably stubborn problem: How do you translate a group of individual preferences into a single choice? In 1785, the French mathematician and philosopher Nicolas de Condorcet discovered that a majority can… Source

In medieval Italy, it was accepted wisdom that anyone walking near a swamp risked falling ill from “bad air” — mala aria. Victims were struck with fever, headache, nausea, and chills, and occasionally the illness escalated to vomiting, jaundice, and death. Today, we still call this affliction malaria. For much of human history, it has ravaged populations in humid tropical and subtropical regions… Source

On a frigid February morning in Edinburgh, Scotland, Patrick Hickey had run out of living things to put under his microscope. The plants and fungi in his garden had dried up, and summer puddles, with their flamboyant biological complexity, had long frozen over. Hickey, a mycologist at Hypha Research Ltd., was using plant leaves to study mitochondria, cellular organelles that generate energy. Source

Among the 377 results that OpenAI announced on October 6, 2026, one stood out. It claimed to settle the “quasi-Riemann hypothesis” — a weaker version of the Riemann hypothesis, which is arguably the biggest open question in math. The new proof is, as Jared Duker Lichtman of Stanford University put it, “the most significant AI-for-math achievement so far, by quite a margin. Source

Benchmarks are the rulers of AI, in both senses of the word. As measuring sticks, they work according to an extremely simple logic: If you want to know what an AI model can do, devise a standardized test to gauge it. But AI benchmarks can also dominate the behavior of the entire field. In 1987, the Defense Advanced Research Projects Agency’s first benchmark on automatic speech-to-text… Source

People may think of soil as just dirt, but it is anything but inert. Beneath your feet, a vast network of mycorrhizal fungi is hard at work, trading minerals with plant roots. This trading system helps enrich the soil, and it sequesters 13 billion tons of atmospheric carbon dioxide each year — roughly equivalent to one-third of the world’s fossil-fuel emissions. Scientists know that these fungi… Source

About 65 million light-years from Earth, three galaxies don’t look quite right. They aren’t whirlpools bursting with light, but pallid objects dimly illuminated by a smattering of stars. “They have this ghostly appearance,” said Michael Keim, an astrophysicist at Yale University. And this isn’t even the weirdest thing about them. Dark matter is the invisible glue that keeps the largest… Source

Everything that’s swept the world since the 2022 release of ChatGPT — “the AI economy”; data centers; chatbots acting as best friends, doctors, and mathematicians; talk of existential risk — it all starts, in some sense, with an intern in a University of Montreal lab named Dzmitry Bahdanau. It was 2014. The 23-year-old Belarusian, who had been coding competitively since he was a kid but hadn’t… Source

By the middle of the 20th century, it had begun to seem that biology was almost solved. Charles Darwin’s theory of evolution by natural selection explained how organisms change and adapt. The modern science of genetics showed how it works at the molecular scale. Genes governing the traits of organisms get passed down from parent to offspring, and random mutations create the variations from which… Source

On the morning of September 11, 2026, Dor Minzer received a text message from a friend asking whether he was close to settling one of the most famous open questions in theoretical computer science. Minzer, a professor at the Massachusetts Institute of Technology and a leading expert on the “unique games” conjecture, initially thought it was a joke. Then more messages started coming in… Source

Throughout the summer of 2026, there were plenty of signs of what was to come. Every week, it seemed, artificial intelligence models were offering proofs of decades-old mathematical conjectures. So what happened on September 8 shouldn’t have been a complete surprise. And yet to many it felt sudden, almost violent. OpenAI announced that its models had solved one of math’s most famous problems — and… Source

In the 1960s and ’70s, colorful comic book advertisements from the Transcience Corporation in New York City promised to mail anyone who sent cash, check, or money order a “bowlfull of happiness” — in reality, a small paper envelope of freeze-dried eggs. Dropped into salt water, the eggs would produce brine shrimp, also known as sea monkeys. Brine shrimp are about a centimeter long and swim… Source

We know all about how things exist in the three dimensions of length, width, and height. Physicists often talk about time as a fourth dimension, but what if there were a fourth spatial dimension — another direction entirely? How on earth would we picture that? Mathematicians use topology to visualize abstract spaces in higher dimensions. Maggie Miller at the University of Texas at Austin… Source

I get out of bed. I walk through the dimly lit hallway, thinking of what’s in my fridge and what I should have for breakfast. With no real effort, I’ve navigated my environment, accessed my memory, and assessed the energetic state of my body, all in the space of a few seconds. How is the brain able to do this? Partly by harnessing electricity. The brain spends about half of its energetic… Source

The late Ronald Graham wore two hats. He was a renowned mathematician, at one time president of the American Mathematical Society. He was also a serious juggler, and president of the International Jugglers’ Association. “He loved tricks,” said Fan Chung, a mathematician at the University of California, San Diego, who was married to Graham. “You know, spinning a ball, spinning a coat hanger… Source

In my first months as a physics journalist nearly a decade ago, I kept running into an inscrutable string of characters: AdS/CFT. Thoroughly intimidated, I decided to just ignore it. But I couldn’t keep my head in the sand for long. I soon learned that those characters are shorthand for a surprising connection between the seemingly inharmonious worlds of gravity and quantum mechanics. Source