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REUTERSA chimpanzee enjoys the sun at Gut Aiderbichls Sanctuary for Traumatized Chimpanzees and other Primates in Gaenserndorf, 50 kms (31 miles) northeast of Vienna, September 14, 2011. After three decades in captivity in tiny cages, 38 former laborator

EPAepa02072909 A Chimpanzee enjoys frozen yoghurt given by zoo official to cool from heat at Dusit Zoo in Bangkok, Thailand, 10 March 2010. The temperature in the Thai captial reach to 34 degree celsius as Thailand enters the hot season while experts warn

REUTERSA bonobo lies at the worlds only sanctuary for the endangered great ape at Lola Ya Bonobo just outside Congos capital Kinshasa, July 31, 2010. Female-dominated and unique to the Democratic Republic of Congo, the bonobo, or pigmy chimpanzee, numbere

REUTERSA bonobo ape, a primate unique to Congo and humankinds closest relative, carries bananas across a pond at a sanctuary just outside the capital Kinshasa, October 31, 2006. Scientifically named Pan paniscus, but more commonly known as pygmy chimpanze

REUTERSBonobo apes, a primate unique to Congo and humankinds closest relative, rest at a sanctuary just outside the capital Kinshasa, October 31, 2006. Scientifically named Pan paniscus, but more commonly known as pygmy chimpanzees, bonobos share 98.4% of

REUTERSZakayo (R), the oldest alpha male chimpanzee in captivity in Uganda, and other chimpanzees eat a cake on his 46th birthday at the Uganda Wildlife Education Centre (UWEC) in Entebbe, 42km (25 miles) south of capital Kampala, August 28, 2010. REUTERS

REUTERSBonobo apes, primates unique to Congo and humankinds closest relative, groom one another at a sanctuary just outside the capital Kinshasa, October 31, 2006. Scientifically named Pan paniscus, but more commonly known as pygmy chimpanzees, bonobos sh

THE CINCINNATI ENQUIRERLindsey, a 2-week-old bonobo, clutches her mother Lisa while she makes her debut at the Cincinnati Zoo Thursday, July 12, 2001. A bonobo resembles a chimpanzee but is smaller. The Cincinnati Zoo is known for its success in breeding

dapdIn this photo taken Feb. 1, 2011, chimpanzees sit in an enclosure at the Chimp Eden rehabilitation center, near Nelspruit, South Africa. A paramedic official says chimpanzees at a sanctuary for the animals in eastern South Africa bit and dragged a man