chimpanzees

It's not cute, but it does tell us a lot about primate cognition.

There are many members of the animal kingdom that rival our own wits.

A Chimpanzee retirement community

But there are good reasons why humans have longer nasal passages than their relatives

Chimps with many friends have a more diverse microbiome, which could help ward off disease

All remaining chimpanzees will be retired

Findings could tell us how our ancestors learned to cook, too

The battle between ape and machine rages on

They're better than fireworks--and last longer, too.

And the sensitivity to contagious yawns develops as they mature, as it does in humans.