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

South Africa has one of the world's richest fossil records of hominins (humans and their fossil ancestors). But many ...

A new DNA model suggests humans didn't reach Australia until 50,000 years ago, but archaeological data disagrees.

New research suggests that the unique way human placentas produce sex hormones during pregnancy may have been a key driver ...

Recent discoveries using lab-grown brain organoids, or "mini-brains," suggest that testosterone increases brain size while ...

The study questions the long-held belief that northern Africa became arid around 3 million years ago, which coincides with ...

The placenta and the hormones it produces may have played a crucial role in the evolution of the human brain, while also ...

A study led by researchers from Brown University finds that rainfall patterns across northern Africa remained largely stable ...