"I believe that the long-term future of the human race must be in space," said Hawking, who is almost completely paralyzed by the illness ALS.
"It will be difficult enough to avoid disaster on planet Earth in the next 100 years, let alone next thousand, or million. The human race shouldn't have all its eggs in one basket, or on one planet. Let's hope we can avoid dropping the basket until we have spread the load."
(Via The Keyhoe Report.)
It's nothing Hawking hasn't said before, but I think it bears repeating.