1. General Time Travel Discussion

      Join us as we discuss the hows and whys of time travel!
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      code_monkey Latest: Mental Time Travel v Phyiscal Time Travel code_monkey, Jul 29, 2015 at 12:56 PM
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    2. Temporal Paradoxes

      Logical contradictions or paradoxes in time travel.
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      code_monkey Latest: You can travel forwards, but not backwards code_monkey, Jul 29, 2015 at 1:15 PM
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    3. Parallel Timelines

      Alternate history, many-worlds interpretations and parallel universe theories.
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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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      A-Alph_0 Latest: universe expanding... world lines growing A-Alph_0, Jul 29, 2015 at 9:57 PM
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    5. I'm a Time Traveler!

      Claims about success and experiments in time travel.
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      A-Alph_0 Latest: Hello, I'm John Titor A-Alph_0, Jul 29, 2015 at 10:52 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.
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      IncreasedSharkAttacks2015 Latest: Does anybody remember this? IncreasedSharkAttacks2015, Jul 29, 2015 at 2:56 AM
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    1. Kafke Latest: Predestination Kafke, Jun 10, 2015
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    2. General Time Travel Fiction

      Time travel in books, film, games, television and more.
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      spectrumisgreen Latest: Been writing...... spectrumisgreen, Jun 27, 2015
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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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    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?
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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...
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    4. Paranormal

      Ghosts, voodoo, magik, portals to other worlds... The unexplained. Can it be explained here?
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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).
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    2. Off Topic

      Discussion of off topic matters that do not fit the other categories.
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    3. 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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      Cosmo Latest: A New TTI Experience: Moving to Discourse Cosmo, Jul 30, 2015 at 3:08 AM
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    2. Introductions

      Drop by and say hello!
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      A-Alph_0 Latest: Hello from me A-Alph_0, Jul 27, 2015 at 1:47 AM
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    3. Cosmo Latest: Alerts, History Cosmo, Jul 29, 2015 at 7:56 PM
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