For a long time, scientists thought the Earth's inner core was a solid ball of metal, sort of like a planet within a planet that sits some 3,000 miles (4,828 kilometers) below the surface.

Keep reading to learn more about Earth's different layers, its atmosphere, and what makes the "blue planet" unique. Earth is made out of different layers, and those layers get hotter and more ...

Earth's diameter is about 7,900 miles. The planet's internal structure comprises four layers: a rocky crust on the outside, then a rocky mantle, an outer core made of magma and a solid inner core.

That’s the antipode, or opposite point on Earth’s surface, from my town. But I only had a garden spade to move the earth.

Giant regions of the mantle where seismic waves slow down may have formed from subducted ocean crust, a new study finds.

An international team led by researchers in Japan and Europe has discovered a new multi-planet system around a Sun-like star, ...

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long ...

"Given how rare such evidence is due to [Earth's] geological recycling processes, this is a major breakthrough in ...

Ancient glaciers triggered floods that altered ocean chemistry, supporting evolving life. Scientists uncover how past events ...