_Others have suggested that a meteor strike might have drastically altered the climate in North America about 12,900 years ago, wiping out most of the large mammals there, the so-called "Younger Dryas impact hypothesis." Now an analysis of thousands of fossils, artifacts and environmental sites spanning millennia suggest that no one killer is to blame for the demise of the woolly mammoths. "These findings pretty much dispel the idea of any one factor, any one event, as dooming the mammoths," researcher Glen MacDonald, a geographer at the University of California, Los Angeles, told LiveScience.
According to the story, scientists analyzed samples from some 1,300 woolly mammoths and other artifacts collected from almost 600 sites. The data reveals that mammmoths and humans coexisted for thousands of years, but as climate and habitat shifted and mammoth numbers dropped accordingly, humans may have helped the species shuffle off this mortal coil by hunting mammoths out of the few remaining pockets of habitat they inhabited.