How do chimpanzees keep up a correspondence? Perhaps with ‘words.’
Chimpanzees howl. They squeak. They bark. And sometimes, they scream, then grunt, then bark, and then scream, all in a row. And according to a study published today in the journal Communications Biology, that series of expressions might carry its own meaning, almost like a chimp phrase. Over the course of 2019 and into 2020