It's time to abandon Earth, warned the world's most famous theoretical physicist. In an interview with website Big Think, Stephen Hawking warned that the long-term future of the planet is in outer space. "It will be difficult enough to avoid disaster on planet Earth in the next hundred years, let alone the next thousand, or million. The human race shouldn't have all its eggs in one basket, or on one planet," he said. "I see great dangers for the human race," Hawking said. "There have been a number of times in the past when its survival has been a question...