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So far, no scientist has been able to prove there even are any aliens, let alone intelligent ones. Someone has to be the first form of intelligent life, and it may well be us. Stephen Hawking says the Universe is so large that it would be nearly impossible for aliens not to exist. And scientist do not by any means think all aliens are intelligent. Hawking says most aliens are probably single-cell organisms. But if aliens ever manage to fly to Earth, they probably ARE pretty intelligent.

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13y ago

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