The wheel was likely invented around 6,000 years ago, but a new analysis of curious rocks from Israel suggests that wheel-like technologies existed even earlier.

Few questions have captivated humankind more than the origin of life on Earth. How did the first living cells come to exist? How did these early protocells develop the structural membranes necessary ...

Signs of temporarily delayed tooth development in the skull of an ancient Homo species youth spark debate about the origins of humanlike growth.

We have an extremely incomplete picture of what these snowball periods looked like, and Antarctic terrain provides different ...

The Arecibo message contained an image of a man only. But what might seem a sexist choice deserves a more subtle ...

Emerging evidence suggests that plate tectonics, or the recycling of Earth's crust, may have begun much earlier than previously thought — and may be a big reason that our planet harbors life.