The lip-smacking vocalizations gelada monkeys make are surprisingly similar to human speech, a new study finds. Many non-human primates demonstrate lip-smacking behavior, but geladas are the only ones ...

When polite people talk, they take turns speaking and adjust the timing of their responses on the fly. So do wild macaques, a team of Japanese ethologists reports. It’s unclear whether the monkeys ...

Humans are not the only ones who can get pulled into spending a lot of time staring at a screen. In a recent study, common marmosets, small South American monkeys, learned to tap videos on a ...