[manasecret]

Future time travel is definitely possible. We all do it everyday, every time you get in a car and drive, every time you walk to the fridge, you're time traveling to the future. The time difference is just too small to notice.

If, however, you got into a very fast spaceship, something nearing the speed of light, then you would easily notice the time difference. Time traveling to the future is part and parcel with Einstein's general theory of relativity.

Time traveling to the past is when things get kooky.