In February 2023, a resident at Kyoto University's Center for the Evolutionary Origins of Human Behavior—EHUB—treated researchers to a spontaneous musical performance. Ayumu, a 26-year-old male chimpanzee, removed floorboards from a walkway and used them to drum while he let out complex and stru ctured sounds similar to vocal expressions. It was something the researchers had never seen him do before. ...read more read less