Time travel is the concept of moving between different periods of time, either by sending people, objects, or information backwards to a time before the present, or forward to a future time. Some ideas of time travel involve moving between parallel universes. A common plot in science fiction, it is currently unknown whether the laws of physics will permit time travel.
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Chronos is a guide to time travel, teleportation, temporal phasing, and other possible applications of nine-dimensional theory. An overview of the new field of transdimensional physics is presented, including how and where to build a sixth-dimensional time gate, and other concepts that need to be understood before time travel is undertaken. - Chronos Technologies
http://www.chronos.ws/
On November 2, 2002, someone who later identified himself as John Titor began posting on a public forum that he was a time traveler from the year 2036, and soon after posting photographs of his time machine and its operations manager. Over the next weeks and months, his posts became prolific. Then, on March 21, 2001, he said that he would be leaving our time and returning to 2036, and was never heard from again. This site tells his story. - John Titor Times
http://www.johntitor.com/
TTI is dedicated to research into the temporal sciences. Visitors to its site may join the organization's researchers in its discussion forum, or read theories and concepts from Dr. Gunthar VonSchnelling, a fictional character created for the site. A guide to time travel in the mass media is also available, along with an online store. - Time Travel Institute
http://www.timetravelinstitute.com/