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:Rats with HUMAN brains – ethical nightmare of lab-built human/rodent hybrids which EXISTThe end of the world is NEAR, and Stephen Hawking has predicted how it will be destroyedNorthern Lights in the UK: Aurora Borealis forecast – can I watch them TONIGHT in the UK?Iceland volcano latest: 53 quakes in 7 days - Bardarbunga magma chamber refillingAre there other planets like Earth? Nasa reveals planets for aliens and human lifeNorthern Lights 2017: Can I watch Aurora Borealis in USA tonight? Where can I watch it?