CNN  —  Chimpanzees living in a sanctuary in Africa have developed a “fashion trend” for dangling blades of grass or sticks from their ear holes and their behinds, a new study shows. In 2010, researchers working at Chimfunshi Wildlife Orphanage Trust chimpanzee sanctuary in Zambia observed how a female chimp started to dangle objects from her ear, and the behavior was soon copied by other members of her group, study lead author Ed van Leeuwen, an assistant professor of behavioural biology at