Stephen Hawking: alien life is out there, scientist warns - Telegraph The man is obviously a genius. And while some might mock him, I would submit that those people are limited by their own intellects, education, and / or conditioning to not perceive the truth as clearly as he can. But the article reminds me of a quote by Arthur C. Clarke, "Two possibilities exist: either we are alone in the universe or we are not. Both are equally terrifying." Assuming that he's wrong, which would be more terrifying to you?