Chimpanzees living in a sanctuary in Africa have been observed following 'fashion trends' by dangling blades of grass or sticks from their ears and their behinds. A new study suggests this behaviour mirrors how cultural fads develop among humans. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth coverage: http://bit.ly/1Z0m6iX Follow CBC News on TikTok: https://bit.ly/3TnHioe Follow CBC News on