Super-genius STEPHEN HAWKING has a message for aliens – stay away!

Not only does the astrophysicist and Einstein-like sage say extraterrestrials are sure to exist, based on the Carl Sagan principle that there are "billions and billions" of stars and galaxies, BUT if they do decide to visit Earth — it’ll be a real War of the Worlds!

In new Discovery series Hawking’s uber-brain postulates intelligent life forms may pose a threat to the Earth which would be devastating for all mankind.

Aliens might simply raid Earth for its resources and then move on: "We only have to look at ourselves to see how intelligent life might develop into something we wouldn’t want to meet.

"I imagine they might exist in massive ships, having used up all the resources from their home planet.

"Such advanced aliens would perhaps become nomads, looking to conquer and colonize whatever planets they can reach."

Even the best case scenario bodes poorly for Earth as well.

 "If aliens ever visit us, I think the outcome would be much as when Christopher Columbus first landed in America, which didn’t turn out very well for the Native Americans," Hawking said.