Stephen Hawking Says Alien Life Likely

Famed astrophysicist Stephen Hawking has been thinking a lot about the cosmic question, "Are we alone?" The answer is probably not, he says.

Hawking said he prefers the third option:

"Primitive life is very common and intelligent life is fairly rare," he then quickly added: "Some would say it has yet to occur on earth."

So should you worry about aliens? Alien abduction claims come from "weirdos" and are unlikely. However, because alien life might not have DNA like us, Hawking warned: "Watch out if you would meet an alien. You could be infected with a disease with which you have no resistance."