Ancient deep-sea organisms suggest movement, sexual reproduction, and complex animal life began earlier than previously thought.

The world’s life-forms reproduce sexually in a bewildering variety of ways, even though scientists still aren’t sure why they bother.

AI romantic companions — digital agents that can text, speak, flirt and are always available — are a rapidly growing social ...

Starting one's sex life and having children at a young age can run in the family. But can pregnancy have beneficial health ...

What if one of the world’s most common parasites could subtly influence the brain? The evidence is compelling in mice, ...

My guest this week believes that our problems today can be traced back to the sexual revolution. She argues that it reset ...

Evolution, a new five-part series tells the extraordinary story of how life on Earth has changed over more than four billion ...

Salvinia molesta can double its biomass in 36 hours. It spreads across ponds, lakes and slow-moving waterways in a smothering ...

Blue tits all look nearly identical to the human eye, yet they spot parasite-ridden partners instantly. The secret lives ...

A new evolutionary theory suggests that some asexual parasites may temporarily be able to infect a wider range of hosts as harmful genetic mutations build up. In a paper published in Trends in ...

New laws in California and New York might stop anyone from 3D printing guns — and create entirely new kinds of surveillance.

I should know. I lived as a woman for eight years. Thirty trillion cells make up the human body, and they deliver undeniable ...