A new study suggests the platypus and echidna — the only egg-laying mammals — had a water-dwelling ancestor. The finding ...

Artificial intelligence has crowned the toughest animal on planet Earth after it was asked to simulate a fight between 256 different species.

The land bridge created by mantle-driven uplift gave early primates and other animals opportunities to branch out.

CHICAGO — From arboretum tours to animal feeding, Earth Week at the Lincoln Park Zoo offers ways to connect with nature and celebrate the days dedicated to protecting our planet. On Earth Day ...