Potoooooooo
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http://www.livescience.com/47885-chimpanzee-aggression-evolution.html
For years, anthropologists have watched wild chimpanzees "go ape" and attack each other in coordinated assaults. But until now, scientists were unsure whether interactions with humans had brought on this violent behavior or if it was part of the apes' basic nature.
A new, 54-year study suggests this coordinated aggression is innate to chimpanzees, and is not linked to human interference.
"Violence is a natural part of life for chimpanzees," Michael Wilson, the study's lead researcher and an associate professor of anthropology at the University of Minnesota in Minneapolis, told Live Science in an email. "They don't need to be fed bananas to kill each other."
For years, anthropologists have watched wild chimpanzees "go ape" and attack each other in coordinated assaults. But until now, scientists were unsure whether interactions with humans had brought on this violent behavior or if it was part of the apes' basic nature.
A new, 54-year study suggests this coordinated aggression is innate to chimpanzees, and is not linked to human interference.
"Violence is a natural part of life for chimpanzees," Michael Wilson, the study's lead researcher and an associate professor of anthropology at the University of Minnesota in Minneapolis, told Live Science in an email. "They don't need to be fed bananas to kill each other."