Evolution

It’s females who vaulted biological hurdles and forged our evolutionary success.

Joseph LeDoux on writing his new book, "The Four Realms of Existence: A New Theory of Being Human."

With his wife, Leda Cosmides, John Tooby transformed our understanding of human nature.

Orchids were Darwin’s “abominable mystery.” They continue to elude science—and efforts to save them.

When sleep doesn’t come on time.

600 million years ago, the sea sponge had a dream.

Violence is written in their genes.

Adaptations that once saved creatures are now putting them in peril.

Parasites, weather, and luck can play a role in determining whether some animals are male or female.

How transcendent feelings arise from the forces of Darwinian natural selection.

How evolution made us laugh.

How parasites manipulate the behavior of their hosts.