For many years, time travel has been a fairly constant source of material for science fiction writers, who would write about some hero going back in time to change the world, or just to see how the world had changed by jumping into the future. The realistic views of time travel though are much more complex than many people might realize, definitely more complicated than a definite "yes" or "no" that time travel is or is not possible. There are several possibilities about time travel, but one that seems to be most universally accepted is that it is almost certainly impossible to travel back in time in our current dimension, but it IS possible to go back in time into a parallel universe. However, it seems that many people believe that time travel into the future is possible. One question that seems to be asked quite often is "If time travel is possible, why are we not consistently visiteed by travelers from the future?" There are many answers to this, but honestly, I don't really want to discuss them on here because they make my brain hurt. Suffice it to say that it seems to be possible, but don't ask me how.
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