The original version of this story appeared in Quanta Magazine. Whenever you’re actively performing a task—say, lifting weights at the gym or taking a hard exam—the parts of your brain required to carry it out become “active” when neurons step up their electrical activity. But is your brain active even when you’re zoning out on … Read more
But there may be opportunities to indirectly spot the signatures of those gravitons. One strategy Vafa and his collaborators are pursuing draws on large-scale cosmological surveys that chart the distribution of galaxies and matter. In those distributions, there might be âsmall differences in clustering behavior,â Obied said, that would signal the presence of dark gravitons. … Read more
His group decided to find out. They built the new, diversified version of AlphaZero, which includes multiple AI systems that trained independently and on a variety of situations. The algorithm that governs the overall system acts as a kind of virtual matchmaker, Zahavy said: one designed to identify which agent has the best chance of … Read more
This is a job for LLL: Give it (or its brethren) a basis of a multidimensional lattice, and it’ll spit out a better one. This process is known as lattice basis reduction. What does this all have to do with cryptography? It turns out that the task of breaking a cryptographic system can, in some … Read more
The original version of this story appeared in Quanta Magazine. Driverless cars and planes are no longer the stuff of the future. In the city of San Francisco alone, two taxi companies have collectively logged 8 million miles of autonomous driving through August 2023. And more than 850,000 autonomous aerial vehicles, or drones, are registered … Read more
“The very reason that we have magnetism in our everyday lives is because of the strength of electron exchange interactions,” said study coauthor Ataç İmamoğlu, a physicist also at the Institute for Quantum Electronics. However, as Nagaoka theorized in the 1960s, exchange interactions may not be the only way to make a material magnetic. Nagaoka … Read more
The original version of this story appeared in Quanta Magazine. We all know to be careful about the details we share online, but the information we seek can also be revealing. Search for driving directions, and our location becomes far easier to guess. Check for a password in a trove of compromised data, and we … Read more
“The cell is effectively dressing up as an infectious agent,” Kagan said. “The result is that it convinces itself that it’s infected, and then operates as such.” Simmering Immunity Immune responses can be destructive, and antiviral responses especially so. Because viruses are at their most dangerous when they’re already inside a cell, most immune strategies … Read more
“We know from direct imaging searches of young stars that very few stars have giant planets in [wide] orbits,” Bate said. “It is difficult to accept that there were many large planetary systems in Orion to disrupt.” Rogue Objects Abound At this point, many researchers suspect there’s more than one way to make these strange in-between … Read more
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And yet, defiantly, these alien seas remain liquid. A Mirror-Wrapped Ocean Scientists suspect that a handful of moons orbiting Jupiter and Saturn—and maybe even some spinning around Uranus and Neptune—harbor oceans. Hefty Ganymede and crater-scarred Callisto produce weak, Europa-like magnetic signals. Saturn’s haze-covered Titan, too, very probably has a liquid-water subsurface ocean. These “are the … Read more
