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245			_aLast Extinction
300			_aApproximately 13,000 years after the mighty mammoth and 35 other groups of mammals vanished from North America, some scientists pose the controversial theory that a massive impact from space may have heralded their demise. For the past four decades,...
650			_xScience.
856			_uhttp://topdocumentaryfilms.com/last-extinction/
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