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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 was popularized by H. G. Wells's 1895 novel The Time ...
The authors concluded that time travel need not lead to unresolvable paradoxes, regardless of what type of object was sent to the past. [36] Top: original billiard ball trajectory. Middle: the billiard ball emerges from the future, and delivers its past self a strike that averts the past ball from entering 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.
Time travel in modern fiction is sometimes achieved by space and time warps, stemming from the scientific theory of general relativity. [9] Stories from antiquity often featured time travel into the future through a time slip brought on by traveling or sleeping, in other cases, time travel into the past through supernatural means, for example brought on by angels or spirits.
Time Machine may refer to: Time machine, a fictional or hypothetical device used to achieve time travel; Film and television. The Time Machine, a film by George Pal ...
If a time traveler attempts to change the past, the laws of physics will ensure that events unfold in a way that avoids paradoxes. This means that while a time traveler can influence past events, those influences must ultimately lead to a consistent historical narrative.
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[2]: 97 Unlike with a time machine, the user is not transported from one moment in time to another. [3] [4] Under the strictest definition it cannot alter the past; [2]: 97 [3] however, the unexpected discovery that the device does indeed affect the past is a common motif.