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Why same object but different space can't be touch?

  1. Dec 5, 2009 #1
    Hello, Chitose wonder chick again.

    I watch serval sci-fi movie and some of It say about theory about same matter in different time.
    like... If I traval back in time and meet myself in the past, I must not touch him. If I do, it will cause some chaos.

    I wonder why?

    I know It pure fantasy but It must base on some actual theory right?

    can anyone tell me?


    PS. English is not my native language, forgive me If I wrong in gramma or spelling.
  2. jcsd
  3. Dec 5, 2009 #2


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    Science Advisor

    I believe JesseM is the resident expert, but he's on vacation this weekend, and usually works in the SR and GR forum.
  4. Dec 6, 2009 #3


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    Gold Member

    Nope. It is total fiction. Nothing more than a plot device.
  5. Dec 6, 2009 #4


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    Yeah, you can touch yourself if you go back in time. But don't murder your grandfather before your father was born!

    Time, Closed Timelike Curves and Causality
    Francisco Lobo, Paulo Crawford
  6. Dec 7, 2009 #5
    I though It's about same electromanatic pules to suck eachother or some thing like that...

    So it's just a plot huh.

    Too bad:frown:
  7. Dec 8, 2009 #6
    Unless you were supposed to, then by all means don't not do it!
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