If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans.

Stephen Hawking's views on Alien visits

Stephen Hawking

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832 Using e-mail, I can communicate with scientists all over the world.
787 Science predicts that many different kinds of universe will be spontaneously created out of nothing. It is a matter of chance which we are in.
785 Observations indicate that the universe is expanding at an ever increasing rate. It will expand forever, getting emptier and darker.
798 My work and my family are very important to me.
814 In Britain, like most of the developed world, stem-cell research is regarded as a great opportunity. America will be left behind if it doesn't change policy.

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