Quote (ExtremeTickler @ Feb 3 2011 10:04am)
impossible
I wouldn't say it's 100% impossible, it depends on your definition of time-travel.
For example, Back to the Future rules of time-travel:
Both ways, forward and back, instantaneous travel.
I do not believe this type of time-travel is possible, especially not to the past, maybe to the future using wormholes or some other cosmic phenomena but I believe it to be one way.
Now consider "The Time Machine" rules of time-travel:
One direction, not-instantaneous travel.
I can subscribe to this method because it has been done already on a small scale. Simply by changing the rate of the passage of time you can somewhat time-travel. This can be done simply by moving very, very fast. The faster you go the slower your "time" moves relative to space around you. I'd be like spending a month in "slow" time while a year has passed in "normal" time. The travel was not instantaneous but over the course of that month you traveled 11 months into the future.