A blazing ball of fire lies deep underground. It’s Earth’s core. This colossal sphere of molten iron far beneath your feet is ...

Why Does It Get Hotter the Deeper You Go? Miners have known this for ages, literally since ancient times: the further you dig ...

A new study suggests ancient hydrogen trapped deep inside Earth has been slowly escaping into the mantle for billions of ...

Deep inside Earth is a solid metal ball that rotates independently of our spinning planet, like a top whirling around inside a bigger top, shrouded in mystery. This inner core has intrigued ...

Unusual hydrogen signatures in volcanic rocks may come from Earth’s core. Simulations suggest ancient magma crystallization cannot explain the differences.

A new study offers an explanation for unusual chemical signatures found in some volcanic rocks.

A battle of forces, driven by the motion of Earth’s core, can explain small variations in the planet’s rotation, study finds.

The Earth's inner core was once liquid, but has turned solid over time. As the Earth gradually cools, the inner core expands outwards at the surrounding iron-rich liquid "freezes." That said, it is ...

This artist’s concept of the Earth’s core shows the inner core in red, the outer core in blue, and the donut in red. The donut region contains more light elements around the equator. Image via ...

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When Earth formed billions of years ago, its metallic core was wrapped in a global ocean of molten rock, which eventually ...