Physicist, cosmologist, author and Director of Research at the Centre for Theoretical Cosmology within the University of Cambridge, Stephen Hawking warns Humanity.
He commented during BBC Reith lecture , Human race is in danger and going to wiped out in next one to ten thousand years as disaster will strike the planet.
He advised to spread out into space and other star. climate change, nuclear war and genetically engineered viruses, could be the downfall of life. Human will lose power on earth and leave Earth because of Aliens.