1. General Time Travel Discussion

      Join us as we discuss the hows and whys of time travel!
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      3,992
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      38,142
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    2. Temporal Paradoxes

      Logical contradictions or paradoxes in time travel.
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      50
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    3. Parallel Timelines

      Alternate history, many-worlds interpretations and parallel universe theories.
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      28
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      244
      Gpa Latest: Alternate timelines, an idea Gpa, Apr 19, 2015 at 9:36 PM
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    4. Philosophy of Space and Time

      The butterfly effect, determinism, eternalism, fatalism, free will, predestination and self-determination.
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      14
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      233
      Aidan Latest: I know things Aidan, Apr 21, 2015 at 3:06 PM
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    5. I'm a Time Traveler!

      Claims about success and experiments in time travel.
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      757
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      20,905
      Raquel H. Latest: Hello, I'm John Titor Raquel H., Apr 20, 2015 at 4:38 PM
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    6. Time Travel Urban Legends

      Accounts of those who allegedly traveled through time, reported by the press or circulated on the Internet.
      Discussions:
      397
      Messages:
      8,361
      pinterest Latest: Old Video of Cellphone Users pinterest, Apr 21, 2015 at 5:18 PM
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    1. Time Travel in Movies

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      114
      joshposh Latest: Back to the Future joshposh, Mar 31, 2015
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    2. Time Travel in Television

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      24
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      25
      [ Z ] Latest: S01E23 - Open the Steins Gate [ Z ], Mar 23, 2015
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    3. General Time Travel Fiction

      Time travel in books, film, games, television and more.
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      129
      Messages:
      586
      Henry Stone Latest: Terminator Genisys Henry Stone, Apr 19, 2015 at 3:41 PM
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    1. Aliens & UFOs

      Some would suggest that UFOs are actually the vessels of travellers from the future. Others claim that they're visitors from other worlds. What do you say?
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      339
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      2,053
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    2. Conspiracies

      Who shot JFK? Did the government cover up a UFO crash at Roswell, New Mexico? What's the *real* story behind 9/11?
      Discussions:
      505
      Messages:
      3,595
      Gpa Latest: Walmarts Closing Gpa, Apr 19, 2015 at 9:56 PM
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    3. Montauk & Philadelphia Experiments

      Did the U.S. government experiment with temporal and dimensional displacement in a Virginia shipyard and on Long Island? The rumors won't die. Maybe there's a reason for that...
      Discussions:
      77
      Messages:
      531
      pinterest Latest: Tesla's Zero Time Generator pinterest, Apr 15, 2015
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    4. Paranormal

      Ghosts, voodoo, magik, portals to other worlds... The unexplained. Can it be explained here?
      Discussions:
      271
      Messages:
      1,684
      Gpa Latest: Gateway to Hell Found in China Gpa, Apr 18, 2015 at 2:41 AM
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    5. Writer's Nook

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    1. Hard Science

      Enough with all this pseudo science stuff. Real science is just as fascinating, weird and spectacular (and often even more so).
      Discussions:
      347
      Messages:
      2,811
      pinterest Latest: Is zero infinite? pinterest, Apr 21, 2015 at 5:23 PM
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    2. Science Fiction

      Discussions:
      5
      Messages:
      127
      Nicolas Latest: Fear the Walking Dead Series Nicolas, Apr 18, 2015 at 12:21 AM
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    3. Off Topic

      Discussion of off topic matters that do not fit the other categories.
      Discussions:
      473
      Messages:
      4,405
      pinterest Latest: Foods you make when you're drunk pinterest, Apr 17, 2015 at 10:47 PM
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    4. Promotional Postings

      Links to your site, time travel related materials, etc. So long as you're on-topic and don't post the same thing repeatedly, you can post it here.
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    1. Announcements

      Announcements and other site news.
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      10
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      80
      Cosmo Latest: TTI in 2015 and Beyond: A Roadmap Cosmo, Apr 16, 2015 at 2:01 AM
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    2. Introductions

      Drop by and say hello!
      Discussions:
      33
      Messages:
      188
      PaulaJedi Latest: Greetings from the past PaulaJedi, Mar 31, 2015
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    3. Site Discussion

      Discussions:
      52
      Messages:
      279
      Henry Stone Latest: How did you hear about TTI? Henry Stone, Apr 19, 2015 at 3:44 PM
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