NASA asteroid WARNING: Why space rock could spark ‘COSMIC WINTER’ on Earth NASA was handed a warning over the potential for a future asteroid to spark a “cosmic winter” if it strikes Earth, during a documentary on the space rocks. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Trending: Where and How to See the Total Eclipse This Summer in the U.S.SHOCK QUANTUM THEORY: The future is affecting the PASTFront Burner: Sustainability Is Focus of New Seafood InitiativePhoto Essay: A Mausoleum for Endangered SpeciesQ&A: Putting the Compression in Compressed AirMars move OFF? Researchers find DEADLY bacteria on Red Planet