User talk:SouthWriter/sandbox/An atheist's objections/@comment-1777104-20100812151447

Basic physics, Yank. Even utilizing the theory of special relativity, which ties gravity to time, I believe, there is no justification for traveling back in time. In quantum theory particles appear to be in two places at the "same time" or perhaps transverse intervening space instantly, but even with that, there is no travel back to a previous point in history. Part of quantum theory makes alternative histories possible, but not time travel.