Did A Comet Hit Great Lakes Region, Fragment Human Populations, 12,900 Years Ago?
ScienceDaily (May 23, 2007) Two University of Oregon researchers are on a multi-institutional 26-member team proposing a startling new theory: that an extraterrestrial impact, possibly a comet, set off a 1,000-year-long cold spell and wiped out or fragmented the prehistoric Clovis culture and a variety of animal genera across North America almost 13,000 years ago.
