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

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.

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long-standing debate over how our planet formed.

Whereas helium-4 is a common product of the decay of radioactive elements, helium-3 comes almost entirely from the initial cloud of dust and gas that formed the solar system. This primordial ...

The trailblazing Harvard scientist, who documented the dominance of hydrogen and helium in stars, is still inspiring ...

More than 75 years after its initial discovery, scientists have created an organometallic molecule containing the ...

Scientists using two enormous telescopes — one on Earth and the other in space — have detected oxygen in the most ancient ...

Physicists have measured a nuclear reaction that can occur in neutron star collisions, providing direct experimental data for ...

For the first time, scientists have directly measured a weak r-process reaction using a radioactive ion beam, shedding light ...