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Unformatted text preview: defensive arm movements, putting hand to mouth and other reaching and grasping movements -- all survival skills. Aggressive behavior is also typical of most primates, human and non-human. Gorillas, humans and chimpanzees will confront members of their own species regarding conflicts, sometimes to the point of killing. The need for social and physical contact is also characteristic of most primates. Present evidence suggests that our own ancestors are to be found among the African large-bodied hominoids, which were widespread between approximately 17 and 8 million years ago (National Geographic). Some of these ape-like primates lived in situations in which the right kind of selective pressure existed to transform them into primitive humans. We are finding that a number of behavioral traits that we used to think of as distinctively human are found to one degree or another among other primates....
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- Spring '08