Joy—fleeting woo-hoo moments like "catching the perfect wave"—is felt by many diverse animals, and researchers want to know how they express it in various situations and why.

For almost two decades, scientists have debated whether sponges or comb jellies are the first animal lineage. Now some are ...

Small mammals are early warning systems for environmental damage, but many species look almost identical, making them hard to track. Scientists have developed a new footprint-based method that can ...

A cow in Austria has made headlines for demonstrating flexible tool use, challenging assumptions about animal intelligence.

Abigail Morris first visited the Peruvian Amazon when she was 6 years old. Now, as a Ph.D. candidate in the Animal Behavior ...

Turtles today are often slow-moving, modestly sized creatures, but their ancient relatives were quite different. Long before ...

Some of the initial symptoms of Nipah virus present like the common flu, but they are very different illnesses ...

"That’s the cutest thing ever," said one social-media user, while another commented: "I can’t handle this." ...

Some animal societies are ruled by despots with an iron fist, while others seem naturally egalitarian – and they all have ...

Scientists once thought that planning required a primate brain. Experiments with birds are now proving that assumption wrong.

Paleontologists spent decades trying to explain "Devil's corkscrews," the bizarre spiral-shaped fossils found in Wyoming and ...

Near Okemah, Okla., rancher Buck Rich has been using combination treatment for several years under the guidance of his ...