Primates sound like humans: Lip-smacking calls may be evolutionary link.

Eerie Human-Like Primate Calls Entrance Researchers (VIDEO)

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April 9 2013 4:16 PM

Eerie Human-Like Primate Calls Entrance Researchers (VIDEO)

Researcher Thore Bergman became interested in the gelada's vocalizations after continuously mistaking the primates’ calls for other human voices calling out to him.

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