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.

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

These results suggest that similar reactions between helium and iron may have occurred within Earth’s core shortly after its formation, trapping much of the primordial helium-3 in the material that ...

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.

By the final stages, the magma closest to the core could have contained water volumes comparable to Earth's present-day oceans." The extreme pressure and temperature conditions within the bottom ...

The Earth is made of different layers: the core, mantle and crust ... The upper mantle is hard but below that is semi-molten rock called magma. Crust The crust is the outer layer of the Earth ...