Plate Tectonics

When Australia got too hot and dry, which killed off forests, these woodland creatures decided to live underground.

The breathtaking fictional landscapes of "Game of Thrones" had a tumultuous past that involved volcanic eruptions, mountain-building and entire continents splitting apart, scientists say.

The InSight Lander has been listening for marsquakes since December.

Geoscientists tracking down reports of curious, out-of-place rocks on Anjouan island have found a mountain-size mystery.

There's a continent-size mystery lurking near the heart of the Earth.

An ancient supercontinent turned inside out as the Earth swallowed its own ocean some 700 million years ago, new research suggests.

As the now-iconic Andes Mountains rose skyward along the western coast of South America dozens of millions of years ago, violent volcanic activity rocked the continent, a new study finds.

When the U.S. Navy classified vital seafloor data during World War II and after, it delayed the development of a key theory.

Are marsquakes the same as earthquakes?

A slippery layer beneath Earth stops chunks of crust in their tracks, creating "stagnant slabs" in the middle of the mantle.