A rash of black bear attacks one Canadian summer has experts looking for answers. Through eyewitness accounts and detailed analysis of the attack scenes, we begin to piece together the puzzle. A bad berry crop the year after a drought is stressing the animals' food supply a spring hunting moratorium several years in a row has led to a surge in the number of young bruins an especially warm summer brings more people into bear country than ever before . But our investigation suggests a much more disturbing reason behind these attacksCould it be that some black bears have learned to see humans as prey?
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