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7 primates with expressive faces

By: Laura Moss on Aug. 22, 2012, 6:30 p.m.

Photo: AFP/Getty Images

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Grumpy gorilla

A silverback gorilla male named Ya Kwanza stands in its enclosure, making a rather unhappy face at the "Gorilla's Camp" at the Amneville zoo in France. Ya Kwanza is part of the European Endangered Species Program, a population-management program for animals that are part of the European Association of Zoos and Aquaria.