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 ...

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

The oral-facial component of human speech evolved from lip smacking, a friendly back-and-forth gesture performed by primates such as chimpanzees, baboons and macaques. The studies suggest a separate ...

Scientists have traditionally sought the evolutionary origins of human speech in primate vocalizations, such as monkey coos or chimpanzee hoots. But unlike these primate calls, human speech is ...

When I first read a description of misophonia, my reaction was: Other people have this?! This intense, angry reaction to everyday sounds like chewing, lip-smacking, sniffing, and pen-clicking—sounds ...

A gelada baboon in Simien Mountains National Park, Ethiopia. Photo by A. Davey via Flickr. Scientists studying the evolution of speech have long puzzled over why there are no good models in primates.