Chimpanzees are known for their intelligence. And one such primate has stunned his keeper after being spotted washing clothes in his enclosure. Yuhui, an 18-year-old male chimpanzee living in China, spent half an hour cleaning a white T-shirt with a brush and a bar of soap, his keeper said. The animal was caught doing the chore last Friday at the Lehe Ledu Theme Park in Chongqing, south-western China. A spokesperson ...