I'm not exaggerating when I say this is the most fascinating thing I've read all morning:
This is our planet’s bleak future: a second Civil War splinters America into five factions, leaving the new capital based in Omaha. World War III breaks out in 2015, starting with Russia and the U.S. trading nukes and ending with three billion dead. Then, to top it all off, a computer bug delivers where Y2K sputtered, destroying our world as we know it. That is, unless an audacious time traveler successfully traverses the space-time continuum to change the course of future history.
In late 2000, that person signed onto the Internet.
A poster going by the screennames “TimeTravel_0” and “John Titor” on a variety of message boards, beginning with the forum at the Time Travel Institute, claimed he was a soldier sent from 2036, the year the computer virus wiped the world. His mission was to head back to 1975 in order to snatch-and-grab an IBM 5100 computer, which had the necessary equipment to fight the future virus. (His detour to the year 2000 was simply to get a little R&R while visiting his three-year-old self, ignoring every fabric-of-time paradox rule from time-travel stories.) Over the next four months, Titor responded to every question other posters had, describing future events in poetically-phrased ways, always submitted with a general disclaimer that alternate realities doexist, so his reality may not be our own. In between dire urgings to learn first aid and stop eating beef—Mad Cow was a serious threat in his reality—Titor provided a number of technical specs regarding how time travel worked, with overly complex algorithms and grainy, hard-to-make-out photos of his actual machine. (Which, yes, of course, was an automobile: a 1987 Chevy Suburban.) He even showed off his cool futuristic military insignia.
On March 24, 2001, Titor offered his final piece of advice (“Bring a gas can with you when the car dies on the side of the road”), signed off forever, and returned home. He was never heard from again.
When you get the chance, read this. It's amazing.