When you look at a map, you can hazard a pretty good guess at where the North and South Poles are. However, because of the fluidity at the Earth’s core, our planet’s magnetic field is not stable, ...

New research suggests that Earth’s solid inner core might not be as rigid as once believed. Instead, it could exist in an ...

A bullet-speed experiment reveals that the Earth's inner core may be softer and more dynamic than previously thought.

(CNN) — 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 ...

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 ...