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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 was popularized by H. G. Wells's 1895 novel The Time Machine. [1] It is uncertain whether time travel to the past would be physically ...
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]
The theoretical study of time travel generally follows the laws of general relativity. Quantum mechanics requires physicists to solve equations describing how probabilities behave along closed timelike curves (CTCs), which are theoretical loops in spacetime that might make it possible to travel through time.
Not all time travel stories involve a person literally moving through time. Peggy Sue doesn’t actually go back to high school in Peggy Sue Got Married; rather, she dreams it (although there is ...
Ronald Mallett loves the concept of time travel. He has since he was a kid. At 77, the former University of Connecticut physics professor still isn’t backing down from his theory: A spinning ...
A must-read for any fans of time travel fiction, The Time Traveler's Almanac is "the largest and most definitive collection of time travel stories ever assembled." In it, editors Ann and Jeff ...
Time portals are doorways in time, employed in various fiction genres, especially science fiction and fantasy, to transport characters to the past or future.. They differ from time machines in being a permanent or semi-permanent fixture linking specific points in time, and thus are an especially useful plot device when the plot involves characters moving many times back and forth.
In science fiction, a time viewer, temporal viewer, or chronoscope is a device that allows another point in time to be observed. [1] The concept has appeared since the late 19th century, constituting a significant yet relatively obscure subgenre of time travel fiction and appearing in various media including literature, cinema, and television.