Hawking's prediction

http://bigthink.com/ideas/21570

In this video, Hawking predicts that people have to move to other planets. it sounds reasoned and well proved.

'The planet is heating up, Earth's population is expanding at an exponential rate, and the the natural resources vital to our survival are running out faster than we can replace them with sustainable alternatives. Even if the human race manages not to push itself to the brink of nuclear extinction, it is still a foregone conclusion that our aging sun will expand and swallow the Earth in roughly 7.6 billion years.’

Finally, 'Hawking says it will take man to make the planet uninhabitable and the billion years it will take for the sun to turn our planet into an arid wasteland, there is always the chance that a nearby supernova, an asteroid, or a quick and painless black hole could do us in.'