[manikgup]

i think that time travel is possible. time is a part of the space-time curvature. so time can be bend this way. in our daily life we mive slower than the speed of the light and that makes us to move to the future as the time is continously running. so it must be possible that moving faster than the speed of the light can make us move to the future, as per the symmetery of the universe. so speed of the light may be that boundary beyond which moving would make us move to the past.