Man's relationship with nature gone wrong, expert says

Jane Goodall greets the audience by imitating a chimpanzee, then launches into an hour-long talk on her relationship with apes and how, from being a primatologist, she became an activist to protect them.

Study explores roots of ethnic violence

A new UCLA-led study challenges the popular perception that ethnic diversity is to blame for sectarian conflicts in Iraq and Northern Ireland, recent tensions in Tibet, and ethnic violence in post-election Kenya.

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