Earth's core is rich with gold, and it's leaking out through the mantle and into the crust, new research has found.

These rocks contain unexpected isotopic signatures that scientists say could only originate from the very boundary between ...

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.

Scientists may now understand why some parts of the planet's crust have much higher concentrations of gold than others do. Gold, as well as other rare metals, can be brought to the surface by ...