Why Time Wars in Only One Dimension

Domini cadan asks why time wars in only one dimension. The answer to this question is that the universe started about 13 point eight billion years ago with the big bang, and it has been growing ever since. Time doesn't have to tick at a fixed rate, though, remember, just because time is moving forwards,. We don't think that you can reverse time, we don't think tha we can go backwards in time. Stephen hawking famously said, i don't think time travel could exist, because otherwise would have been invaded by tourists from the future. But you can still change the rate at which time ticks. And we've got evidence for that happening all the time.