Human language hasn’t simply replaced the vocalizations of our primate cousins. Instead, we use language on top of the communication systems we inherited from our prelinguistic predecessors. We laugh ...

Here's something that'll make your next giggle session feel a bit weird: scientists genuinely can't figure out if your laughter evolved from joyful chimp panting or from the threatening bared-teeth ...

When a slack-mouthed chimpanzee lets loose a husky guffaw, you know he's having a good time. Homo sapiens isn't always so transparent—sometimes when we laugh, we're just being polite—but it turns out ...

Compared to children, adults don't play as much, but social play into adulthood is considered a universal human trait. Play has a role in building tolerance, cohesion, bonding, and cooperation. By ...