A tiger walks the same worn groove along the edge of its exhibit, like a broken record. A parrot methodically plucks out its ...

Prosecutors say Kimbrady Carriker was wearing a ballistic vest and carrying weapons in his home for “some time” before Monday’s mass shooting. Philadelphia District Attorney Larry Krasner speaks at a ...

1. Although a particular behavior may not be in itself abnormal, it may be part of a pattern that reflects an abnormal process. Sleeping less than average, for instance, is sometimes associated with ...

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 ...