Time travel has always had a major loophole -- that a time traveller going back in time can change the present such that he/she wouldn't have to go back in time to begin with. Researchers suggest a solution -- New model 'permits time travel' -- but it all smacks of Baron Munchausen to me still :p

Well, as a sticker on a door in my old dorm read, "Wherever you go, there you are."