People often consider evolution to be a process that occurs in nature in the background of human society. But evolution is ...

Human testicles are much smaller, in proportion, to some of our primate cousins. Evolution can tell us why. But the size of ...

Depression feels weird compared to things like fear or anger, which help us survive by warning us of danger or pushing us ...

Humans lost their ability to synthesize their own vitamin C because our ancestors had access to plenty of fruit.