As in a batch of kombucha or a barrel of sherry, microbes can assemble into a mat-like layer at the boundary between air and ...

A bizarre fossil called Prototaxites, which was the largest life-form on land 400 million years ago, may have been a completely unknown form of multicellular life, according to a new study.

Ancient duplicated genes are giving scientists their first real clues about what life was like before all life on Earth shared a common ancestor.

All life on Earth shares a common ancestor that lived roughly four billion years ago. This so-called "last universal common ...