In the past, many scientists believed that only mammals and birds could feel or think in complex ways. Reptiles, fish, and insects were seen as simple creatures that reacted purely on instinct. But ...

Add Yahoo as a preferred source to see more of our stories on Google. All three of these discoveries came in the last five years — indications that the more scientists test animals, the more they find ...

A group of prominent biologists and philosophers announced a new consensus: There’s “a realistic possibility” that insects, octopuses, crustaceans, fish and other overlooked animals experience ...

Insects are fascinating and highly diverse animals who far too often are written off as pests and nuisances whose lives are totally disposable. However, their global presence and ubiquity are ...

Bees play by rolling wooden balls — apparently for fun. The cleaner wrasse fish appears to recognize its own visage in an underwater mirror. Octopuses seem to react to anesthetic drugs and will avoid ...