Core-mantle boundary

Space Scientists discover remnants of Theia, the planet that collided with Earth 4.5 billion years ago

Two vast structures near Earth’s core could preserve pieces of Theia, the lost world linked to the Moon’s formation.

Discoveries In 2010, Earth’s molten core suddenly reversed direction and scientists don’t know why Joseph Shavit

Discoveries Antarctic seismic data points to an ancient structure circling Earth’s core Joseph Shavit