Long-tailed macaques given short videos were glued to scenes of fighting—especially when the combatants were monkeys they knew—mirroring the human draw to drama and familiar faces. Low-ranking ...

On an island in Panama, a fad that one researcher called "viscerally disturbing" has recently taken off among a group of young male monkeys. These adolescents and juveniles have started to kidnap the ...

Primates are a group of mammals that includes humans and our close relatives, such as apes, monkeys and lemurs. Monkeys, such as capuchins and macaques; prosimians, like lemurs and tarsiers; lesser ...