Stephen Hawking Says Mankind Can’t Survive on Earth More Than Another 1,000 YearsStephen Hawking Says Mankind Can’t Survive on Earth More Than Another 1,000 YearsRenowned astrophysicist Stephen Hawking says the human race is doomed, unless we figure out how to leave Earth behind in the next 1,000 years.Wes GlinsmannWes Glinsmann