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This very accessible book covers a variety of topics including the history of time travel in fiction; the fundamental scientific concepts of time, space-time, and the fourth dimension; the speculations of Einstein, Richard Feynman, Kurt Gdel, and others; time travel paradoxes, and much more. The new edition is substantially updated throughout and contains a new glossary of important terms. What's new in the second edition? Discussion of additional stories and movies that were omotted or have appeared since 1993; Discussions of the physics literature that has appeared since 1993; Two new Tech Notes, one on the connection between time and gravity and one on the cosmic string time machine invented by Gott at Princeton; Greatly expanded Tech Note on wormholes and time machines, because this particular form of time machine continues to receive intense study; A glossary of important terms, an addition prompted by the numerous e-mail suggestions from all over the world to improve Time Machines. The new edition is substantially enlarged and updated throughout.
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