Stephen Hawking: Alien Contact Could Be Risky

Alien encounters may seem like sure-fire winners to Hollywood, but one of the world's most famous scientists thinks they may be "too risky" be be worth seeking. In a new Discovery Channel documentary, which premiered Sunday night, British astrophysicist Stephen Hawking said that communicating with aliens could be a threat to Earth. Hawking said it is likely that alien life exists, but a visit from extraterrestrials might be similar to Christopher Columbus' arrival in the Americas. "If aliens...Full Story
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