Ever wonder how Earth scientists examine rocks? We cut them up and throw them under a microscope ... and then everything seems different.

In Earth’s early days, more than 4 billion years ago, the surface was a dangerous and unpredictable place. Violent volcanoes, ...

There has been much debate among scientists about whether an area deep within the Earth is dry as a rock or sloshing with ...

A biosignature is any characteristic, element, molecule, substance or feature that serves as evidence for past or present ...

A remote outcrop in Canada harbors rocks that are at least 4.16 billion years old, researchers report June 26 in Science. If true, these rocks would be the oldest known on Earth and the first to date ...