Nearly three fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese researchers have made a compelling case that Earth’s oceans were once green, in a study published in Nature. The reason Earth’s oceans may have looked different in the ancient past is to do … Read more
Dyson spheres, the hypothetical mega-structures that advanced alien civilizations might use to enclose a star and harness its energy, suffer from a fatal flaw: They are catastrophically unstable. But now an engineer claims to have figured out a way to stabilize these structures — and all it takes is two stars. In the 1960s, physicist … Read more
Mercury’s mysterious makeup may be the result of a grazing “hit and run” collision between two similar-sized protoplanets in the early solar system, a new study suggests. Mercury, the smallest and innermost planet in our solar system, has a number of unusual characteristics that have long puzzled scientists. Despite being only slightly larger than Earth’s … Read more
Holograms that can be physically manipulated have made their way out of science fiction and into real life thanks to a breakthrough in mixed reality technology. In a new study uploaded March 6 to the HAL open archive, scientists explored how three-dimensional holograms could be grabbed and poked using elastic materials as a key component … Read more
Kangaroos are pretty peculiar on the outside: They’re the world’s largest marsupials, they hop to get around, and they use their tails as a fifth limb. But they’re also pretty unusual on the inside: Female kangaroos have two vaginas — or three, if they’ve given birth. Why could that be? The most likely explanation is … Read more
Physicists have discovered a new phase of matter, dubbed “half ice, half fire,” that could open the door to new advancements in fields such as quantum computing. The new phase combines a number of “up” spins of electrons within an atom, which are highly ordered and referred to as cold cycles, with a number of … Read more
You may have heard the myth that humans use only 10% of their brains. That statement is patently untrue — most people use all of their brains, all of the time. But for people who have survived a stroke, traumatic brain injuries or brain resectioning surgeries, things do get less clear. In fact, many of … Read more
We think of oxygen as life, sustenance, a literal breath of fresh air. But it’s actually a very reactive element. Anyone who’s burned a log has witnessed this firsthand. So why do so many life-forms breathe oxygen? There are probably thousands of kinds of metabolisms, or chemical processes that maintain life, said Donald Canfield, a … Read more
Current approaches to artificial intelligence (AI) are unlikely to create models that can match human intelligence, according to a recent survey of industry experts. Out of the 475 AI researchers queried for the survey, 76% said the scaling up of large language models (LLMs) was “unlikely” or “very unlikely” to achieve artificial general intelligence (AGI), … Read more
A new kind of road-legal flying car is now a step closer to hitting the roads, and skies, after its maker Alef Aeronautics signed an agreement with aerospace companies PUCARA Aero and MYC to build it. The Alef Model A is designed to work as both a road vehicle and aircraft, with its aim being … Read more
