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In the 1970s, the late Jane Goodall observed a community of chimpanzees in Gombe, Tanzania, breaking into two factions; the males in one group ended up killing all the males in the rival group over the next four years, along with one female chimp. But the case was considered an anomaly, although there is genetic evidence suggesting this kind of split is a rare event occurring every 500 years or so. Now researchers have observed the largest known community of Ngogo chimpanzees in Uganda also permanently splitting into two rival groups with a similar outbreak of violence, according to a new paper published in the journal Science.，详情可参考扣子下载
阿塞拜疆沿岸连续发生五次地震 20:45