At Chimfunshi, chimps don’t face predators or food shortages. That leaves them with more time to rest, groom, and invent.

Val, a fully grown male chimpanzee, is seen showcasing the 'grass-in-ear' behavior at the Chimfunshi Wildlife Orphanage Trust ...

Chimpanzees at a sanctuary in Zambia have been found to have developed the “seemingly pointless” behavior of dangling blades ...