BEGIN TRANSCRIPT RUSH: Stephen Hawking. Are you ready for this? Stephen Hawking is said to be the smartest man on earth. It's a toss-up between who's smarter, Hawking or Hillary Clinton. Stephen Hawking says we only have 1,000 years. If we don't find another planet or an asteroid to colonize, that's it for the human race, and that's largely because of climate change. One thousand years. Where are you gonna book your time? Is Elon Musk... Are they gonna give him some drug that keeps him alive forever? He, by the way, will be subsidized to the tune of $55...