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Interesting animal behavior, with a male chimpanzee (Pan troglodytes) walking upright, like a human, across a dirt road. The other four chimps are moving in the usual way, with knuckles to the ground, in Ngogo, Kibale National Park, Uganda.

Interesting animal behavior, with a male chimpanzee (Pan troglodytes) walking upright, like a human, across a dirt road. The other four chimps are moving in the usual way, with knuckles to the ground, in Ngogo, Kibale National Park, Uganda.