Advanced aliens could 'conquer and colonise' our planet, warns Stephen Hawking
The world famous physicist has admitted that if aliens came to visit Earth, the outcome might not be a positive one.
Stephen Hawking has tackled the mysteries of the universe his entire life.
"If aliens visit us, the outcome could be much like when Columbus landed in America, which didn’t turn out well for the Native Americans," Professor Hawking told El País .
"Such advanced aliens would perhaps become nomads, looking to conquer and colonize whatever planets they can reach," he said.
The physicist, who has suffered from motor neurone disease since his twenties, explained that the existence of aliens is beyond doubt.
"To my mathematical brain, the numbers alone make thinking about aliens perfectly rational. The real challenge is to work out what aliens might actually be like."