Tatu, a female chimpanzee who was part of the ground-breaking sign language communications study that included Washoe and 3 other chimpanzees in Washington, USA, turned 40 years of age this week. Tatu was transferred to the Fauna Foundation sanctuary in Canada in 2013 when the Central Washington University study closed. For more, visit http://ift.tt/LBhKud http://ift.tt/1SmAtwB
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