Almost all of Earth’s gold is hundreds of feet below the surface. But some of it is oozing from the core into the mantle.

Earth's inner core rotates in the same direction as the ... which face far less adversity — can reach a ripe old age of 4 billion, according to Earth Observatory of Singapore.

“When the first results came in, we realized that we had literally struck gold,” Nils Messling, a geochemist at Göttingen ...

Electric currents created in the fluid metal outer core that produce Earth's magnetic field. Credit: Andrew Z. Colvin / Wikimedia Commons (CC BY-SA 4.0) Yet the magnetic field holds mysteries we ...

By Kenneth Chang The inner core of the Earth appears to hold an innermost secret ... That is a fraction of the planet’s 4.5-billion-year history, and the structure of the solid core appears ...

Earth’s core is not as dense as pure iron ... Unlike the helium we are most familiar with—also known as Helium-4 (4 He)—primordial helium, or helium-3 (3 He), does not originate on Earth.

lending support to the theory that the noble gas is leaking from Earth’s core — and has been for millennia. The research team also detected helium-4 within the rocks. While helium-4 is common ...