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S1 • E6 Aug 12, 2009 60mChimpanzees in Senegal have been observed carrying out astounding behaviors that have experts stunned. They've developed survival skills once believed to be performed only by humans - like hunting mammals with tools made of sticks. What can their actions tell us about our own origins? Anthropologist and National Geographic Emerging Explorer Jill Preutz chronicles these chimps and the lessons to be learned about ourselves.
