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Male capuchin monkeys on a Panamanian island were documented carrying around infant howler monkeys for no clearly discernible reason. By Elizabeth Landau Capuchin monkeys don’t generally hang out with ...

Monkeys and apes are often grouped together in everyday language, but in the world of biology, they are quite different branches of the primate family tree. While both share intelligence, social ...

A howler monkey infant, only a few days old, clings to a subadult white-faced capuchin monkey as it uses tools. Brendan Barrett / Max Planck Institute of Animal Behavior In June 2022, while watching ...

Japanese macaques, colloquially referred to as snow monkeys, famously soak in steaming hot springs during winter. It's easy to see that this helps them stay warm in cold temperatures, but a team of ...