Rocks in Australia preserve evidence that plates in Earth’s crust were moving 3.5 billion years ago, a finding that pushes back the beginnings of plate tectonics by hundreds of millions of years.

At a site called East Farm in England, recent excavations revealed reddened silt, flint handaxes distorted by heat, and fragments of a mineral—iron pyrite—that could have been used to make sparks on ...

Neanderthals 400,000 years ago were striking flints to make fires, researchers have found. Neanderthals 400,000 years ago were striking flints to make fires, researchers have found. An artist’s ...