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245 _aSuper Comet
300 _aScientists believe that an asteroid impacted the planet over 65 million years ago and effectively wiped out most of all life in its wake, including the entire dinosaur population. Is it only a matter of time before Earth is...
650 _xScience.
856 _uhttp://topdocumentaryfilms.com/super-comet/
999 _c334381
_d334381