Chimpanzees Keep Throwing Stones at the Same Trees – Scientists Want To Know Why

Chimpanzee stone-throwing sites may preserve rare evidence of primate culture and communication. In the savanna woodland of Boé National Park in Guinea-Bissau, a scarred tree can tell a strange story. Around its base, rocks may lie in small piles, while its trunk bears the marks of repeated impacts. The chimpanzees that made them may already [...]