In physics, time travel generally refers to the ability to move forwards or backwards in time, either through time dilation effects or advanced technology that creates wormholes or time machines. Although time travel is possible in theory according to the laws of physics, it currently remains purely science fiction.

In science fiction, time travel has been a popular theme in books, movies, and television shows. There are many different models of time travel, such as the butterfly effect, parallel universes, and the grandfather paradox. These models explore the implications of messing with the timeline and the consequences it may cause.

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