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.

Scientists have identified another possible commonality between Earth and Mars: a solid inner core. Scientists have ...

A new study of decades worth of seismogram data shows that the surface of Earth’s iron and nickel core is more malleable than scientists thought.

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 inert helium can form bonds with iron may reshape our understanding of Earth’s history. Researchers from ...

Located 3,000 miles below the Earth’s surface, the inner core is anchored by gravity within the molten liquid outer core ... cores consist primarily of iron and nickel. They're extremely ...

LOS ANGELES — Scientists have just detected something unusual happening 3,000 miles beneath our feet. New research from an international study reveals that Earth’s inner core, a ball of mostly ...

Data from NASA's InSight mission has revealed that Mars has a liquid core. Similar to Earth's core, the core of Mars is expected to be dominantly composed of molten iron metal. However ...

New research reveals that the Moon's core has a density similar to that of iron. This discovery may settle long-standing ...

The planet’s inner core was previously thought of as a hard, solid sphere. But a new study has found that its edges are softer than realized and actually changing shape as they press against the ...

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 ...