Time machine

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A time machine is a device which allows its user to travel through time, either to the past or the future. In general, such a device is believed to be against the laws of physics, though a one-way trip to the future could theoretically be organized in a number of ways that do not violate these laws. If real time machines exist they would involve tampering with black holes billions of miles out in space, and would be massively expensive and impractical.

Time Travel in Popular Culture

Time machines have played an important role in science fiction, ever since H.G. Wells's famous book of the same name over a hundred years ago. Some of the more well-known examples include:

  • Doctor Who, a BBC series about a time traveller and his adventures.
  • The Back to the Future trilogy of movies.
  • The Terminator franchise, in which a future artificial intelligence sends machines back to kill the man who will destroy it.
  • 12 Monkeys, a movie in which a man is sent back in time to prevent a devastating disease.
  • Star Trek. Time travel is a common plot device in this series, including 3 of the movies.
  • Bill & Ted's Excellent Adventure, a comedy in which two high school students travel through time to research for a history project.
  • Inuyasha, a Japanese anime in which a high school girl travels between the present day and feudal Japan via an enchanted well.
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