You know, time travel is theretically possible. Yeah, the speed of light mumbo jumbo, but basically, if you're in control of a wormhole, you can enable time travel by, say for the future, accelerate the exiting end of the wormhole, or for past, accelerate the entry of the wormhole. Though, scientists say because of a certain attribute matter has, I forget what it was, it would only leave the wormhole stable for a split second before collapsing in on itself.