Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.

Time travel is no more a science fiction.

Stephen Hawking

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833 Using e-mail, I can communicate with scientists all over the world.
788 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.
786 Observations indicate that the universe is expanding at an ever increasing rate. It will expand forever, getting emptier and darker.
799 My work and my family are very important to me.
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