Was a giant comet responsible for a North American catastrophe in 11,000 BC?
ScienceDaily (2010-04-01) -- Some 13,000 years ago, Earth was struck by thousands of Tunguska-sized cometary fragments over the course of an hour, leading to a dramatic cooling of the planet, according to a new astronomical model. ... > read full article
Tuesday, April 6, 2010
Was a Giant Comet Responsible for a North American Catastrophe in 11,000 BC?
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