Earth appears to be a chill blue planet, but deep down, it’s really a metalhead. Its outer core is mostly molten iron (and ...

Scientists from Japan and Taiwan recently demonstrated that helium, the second-lightest element, can integrate into iron's ...

“Unlike helium-4, which is produced through radioactivity ... “Our calculations also revealed a dynamically stable crystal structure, supporting our experimental findings.” Altogether, this ...

Earth’s core could contain helium from the early solar system. The noble gas tucks into gaps in iron crystals under high pressure and temperature.