Playing Devil's advocate, humanity has survived pole reversals, ice ages, earthquakes, floods, tsunamis, all manner of man-made, and natural disasters. I believe humans would survive a nuclear war.
Inspite of Hawking's genius, going into space because human life is in danger on the Earth is such a weak argument. Human life is 1000X more in danger in space or on another planet. Even if humans colonized another world, humans there would not be self-sufficient, they would still depend on the resources from Earth. So if humans on Earth were completely wiped out, the extra-terrestrial humans would be *****ed as well.
Nevertheless, I think Hawking makes a good point about the money, more should go into space exploration and research.
Last edited by chator : 06-18-2012 at 10:16 PM.