A layer of charged particles, called the ionosphere, surrounds Earth, extending from about 50 to 400 miles above the surface of the planet. Disclaimer: AAAS and EurekAlert! are not responsible for ...

In this diagram, the red lines represent ... The mantle is a semi-solid layer below the crust. There are no elements in this part of the Earth's structure that can be easily extracted.

Seismic mapping of North America has revealed that an ancient slab of crust buried beneath the Midwest is causing the crust ...

Scientists Baffled to Find Signs of Another Core Within Earth’s Inner Core, Say ‘We Have to Rewrite the Textbooks’ For ...