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

In most cases, evolution is a pretty slow process, taking hundreds if not thousands of years—but when humans enter the ...

If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have evolved testicles of all different sizes. In almost all these separate cases, ...

Look in the mirror and the feature that quietly sets you apart from every other species is not your eyes or your opposable ...

Humans were living in rainforests roughly 150,000 years ago, some 80,000 years earlier than was previously thought—and may have been an important center for early human evolution. This is the ...

Researchers find Apennine brown bears evolved into a smaller, less aggressive animal after centuries of coexistence with humans.

Since the Middle Ages, the size of wild and domestic animals has largely been shaped by human selection: domestic animals are increasingly larger; wild animals increasingly smaller. During the 7,000 ...

Ronan the sea lion can dance to a lot of different songs, but there is something about “Boogie Wonderland,” by Earth, Wind and Fire that really gets her going. It didn’t take more than a few days for ...

A lost chapter in human evolution has been revealed after an analysis of modern DNA found that we come from not one but two ancestral populations—ones that drifted apart and later reconnected long ...

Bite force, a measure of the strength of an animal's bite, helps researchers understand a species' role in the ecosystem.

Research on SARS-CoV-2 in zoo tigers, lions, and hyenas shows rapid viral evolution and adaptation, offering insights into cross-species transmission dynamics.