To a casual visitor, these can look like odd habits or animal “quirks.” But to animal welfare researchers and zookeepers, ...

A new three-volume study, Abnormal Psychology Across the Ages, shows how far we have come in diagnosing and treating mental illness. In the Renaissance, the mentally ill were feared, shunned, and ...

Many people seem to think calling a dog good, bad, happy, sad, aggressive, stubborn, bold, shy, vicious, alpha, pessimistic, optimistic, or abnormal can help us understand what they’re thinking and ...