Our planet has been asteroid-smashed, melted and eroded, enough that most of its original armor has been long buried. Except ...

Unravelling Earth’s 4.5-billion-year history with rocks is tricky business. Case in point: the discovery of an ancient meteorite impact crater was recently reported in the remote Pilbara region of ...

The origins of plate tectonics on Earth are hotly debated, but evidence from Australia now shows that parts of the crust ...

Since their formation billions of years ago, the oldest parts of Earth's continental rocks have generated natural hydrogen in ...

Every breath we take in contains 21% oxygen, the gas that makes life on Earth possible. Oxygen, in its combined oxide state, has always been abundant in Earth's crust, but elemental diatomic ...

Earth is about 4.5 billion years old, and as the eons passed, the crust of the young planet experienced turbulence. Asteroid collisions shattered some parts, which melted and recrystallized, while ...

A Part of Earth’s Original Crust Still Exists NEMES LASZLO/SCIENCE PHOTO LIBRARY - Getty Images "Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." ...