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Previous stories about the evidence for an extra-terrestrial root cause to the Younger Dryas period AND the possible impact this period of colder weather had can be found in the megalithic Portal under these stories:
* May 2007 Diamonds tell tale of comet that killed off the cavemen
* April 2010 Was a Giant Comet Responsible for a North American Catastrophe in 11,000 BC?
* April 2010 Ancient Americans took cold snap in their stride
and Site Listings for
* Murray Springs
* Topper
* Goughs Cave (Cheddar)
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