: Try this: Take of piece of paper and think of one : side as representing space (going to infinity) and : the other side as time (going to infinity). Now take : a pencil and put its point on the paper- it represents : you in normal space-time. Now, without picking : up the pencil, put you pencil somewhere else on the : paper. You have to travel in space-time to get : somewhere else. This is why time travel is impossible.

: You cannot pick your pencil off the paper because : it is impossible to just "drop" out of space-time : and travel about freely (after all, we exist in space, : and would not exist elsewhere). If you can figure : out how to "drop" out of space-time and still exist, : then you can time travel. If you can figure it out, : (with real Physics), you're a genious!

:I believe that time travel is possible it is just a matter of time as to when we figure it out. No pun intended there. :I do have a few questions though. The first could help answer many others. It is more of a chanllenge. What is the equation for time travel as we know it. I do not mean as we are going backward or forward a great distance, but rather time travel at our current pace. If we knew this, alterations could be made to make imagined time travel a reality. :The second question relates to what if we could time travel. If we could what would we do? Would we merely observe or would we make a change? I don't think that we can because if we made a change in the past it would cause a ripple through time. This ripple would would continue to the current time so as if the event never happened therefore there would be no need to have change it. Thus I determine that making a change to the past is impossible. :This is unless the change in the past created an alternate world in which the event was still unknow but the time traveler would retain his knowlege of the original past. That is, if it truely was the orginal past...