Stephen Hawking: Aliens may exist and could be dangerous

There's a good chance we don't want aliens to come calling, Hawking says.

So, the world's most famous astrophysicist has some advice about whether we should or shouldn't try to make contact with creatures from outer space:

Don't do it, Stephen Hawking advises.

It would be much better for humans to keep a low profile, he says. There's a good chance we don't want aliens to come calling, Hawking says, because they very likely wouldn't be the cuddly, ET types we hope for.

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