I read it, and have talked it over a lot with my Physics teacher and stuff. They don't move into the past or future, moving into the past is impossible. It APPEARS that they've moved into the future because relatively less time has elapsed. That's the whole point of the theory of relativity, that as you approach the speed of light, time changes, it goes slower. That's why if you were to travel at the speed of light for one year, 10 years or whatever would have passed on earth. Relatively less time elapsed, giving the appearance of travelling into the future.