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  2. Time travel - Wikipedia

    en.wikipedia.org/wiki/Time_travel

    The first page of The Time Machine published by Heinemann. Time travel is the hypothetical activity of traveling into the past or future. Time travel is a concept in philosophy and fiction, particularly science fiction. In fiction, time travel is typically achieved through the use of a device known as a time machine. The idea of a time machine ...

  3. The Time Machine - Wikipedia

    en.wikipedia.org/wiki/The_Time_Machine

    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.

  4. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    The equation of time was engraved on sundials so that clocks could be set using the Sun. In 1720, Joseph Williamson claimed to have invented a clock that showed solar time, fitted with a cam and differential gearing, so that the clock indicated true solar time. [137] [138] [139]

  5. Ronald Mallett - Wikipedia

    en.wikipedia.org/wiki/Ronald_Mallett

    The presence of closed timelike lines indicates the possibility of time travel into the past. This creates the foundation for a time machine based on a circulating cylinder of light. Mallett's book, Time Traveler: A Scientist's Personal Mission to Make Time Travel a Reality, co-written with author Bruce Henderson, was published

  6. Timeline of time measurement inventions - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_time...

    This timeline of time measurement inventions is a chronological list of particularly important or significant technological inventions relating to timekeeping devices and their inventors, where known. Note: Dates for inventions are often controversial. Sometimes inventions are invented by several inventors around the same time, or may be ...

  7. Niven's laws - Wikipedia

    en.wikipedia.org/wiki/Niven's_laws

    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]

  8. Time travel in fiction - Wikipedia

    en.wikipedia.org/wiki/Time_travel_in_fiction

    A time slip is a plot device in fantasy and science fiction in which a person, or group of people, seem to travel through time by unknown means. [12] [13] The idea of a time slip has been used in 19th century fantasy, an early example being Washington Irving's 1819 Rip Van Winkle, where the mechanism of time travel is an extraordinarily long sleep. [14]

  9. Time Machine - Wikipedia

    en.wikipedia.org/wiki/Time_Machine

    The Time Machine, an 1895 novel by H. G. Wells; Time Machine (short story series), a 1959–1989 series of stories published in Boys' Life magazine; Time Machine (novel series), a 1984–1989 series of children's adventures