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A different law is given this name in Niven's essay "The Theory and Practice of Time Travel": [1] If the universe of discourse permits the possibility of time travel and of changing the past, then no time machine will be invented in that universe. Hans Moravec glosses this version of Niven's Law as follows: [2]
The Time Machine was reprinted in Two Complete Science-Adventure Books in 1951. A Victorian Englishman, identified only as the Time Traveller, tells his weekly dinner guests that he has experimental verification of a machine that can travel through time. He shows them what he says is a small model, and they watch it disappear.
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Vanderkam became interested in time management while working as a journalist, when she interviewed accomplished people who juggled busy schedules. [3] In October 2016, she presented a TED talk called "How to gain control of your free time". [4] She has written for Fortune, [5] USA Today, Redbook, The Wall Street Journal, [6] and The New York Times.
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Since his time machine now was never invented, Weaver is unable to go back again and correct his mistake. "Language for Time-Travelers" (essay). De Camp explores an issue hitherto ignored by writers of time-travel fiction; the barriers to communication in the eras visited by time-travelers posed by natural language change.
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Paul Davies, How to build a time machine, 2002, Penguin popular science, ISBN 0-14-100534-3 gives a very brief non-mathematical description of Gott's alternative; the specific setup is not intended by Gott as the best-engineered approach to moving backwards in time, rather, it is a theoretical argument for a non-wormhole means of time travel.