Book: Space And Time Warps by Stephen William HawkingThis lecture is the intellectual property of Professor S.W. Hawking. You may not reproduce, edit or distribute this document in anyway for monetary advantage. In science fiction, space and time warps are a commonplace. They are used for rapid journeys around the galaxy, or for travel through time. But today's science fiction, is often tomorrow's science fact. So what are the chances for space and time warps. The conclusion of this lecture is that rapid space-travel, or travel back in time, can't be ruled out, according to our present understanding. They would cause great logical problems, so let's hope there's a Chronology protection Law, to prevent people going back, and killing our parents. But science fiction fans need not lose heart. There's hope in string theory.
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Stephen William Hawking - Space And Time Warps