A new study theorizes that evolution ticks at different speeds, especially when a big group of organisms first appears.

Animals have evolved crab-like bodies at least five times throughout history, a process known as carcinization.

It's considered one of the most decisive steps in human evolution. Now, scientists believe they have pinpointed when our ...

Gordon Burghardt kept a lion cub named Meg in his home at the behest of the Knoxville Zoo. To help Meg get out some energy, Burghardt and his wife would often play with Meg in their wooded, unfenced ...

This has been quite the wild year in human evolution stories. Our relatives, living and extinct, got a lot of attention—from ...

Human evolution is not a straight line but a complex branching tree shared with other great apes. This overview explains the distinction between hominids and hominins and traces the evolutionary ...

One of the biggest quests in biology is understanding how every cell in an animal's body carries an identical genome yet still gives rise to a kaleidoscope of different cell types and tissues. A ...

The skull had the brow of a descendant but the face of an ancestor. When researchers finished reconstructing the DAN5/P1 cranium from Ethiopia’s Afar region, dated to between 1.6 and 1.5 million years ...