I hope nobody minds that I'm bringing back a discussion that was some pages ago, and posted by someone who seems to no longer be replying...
quote:
The obvious shortcoming in this arguement is that on a journey from California to Florida, I could stop (we have no indications that time has ever stopped) or I could turn around (we have never seen time go backwards). Here on earth, we have choices about travel; where we go, how fast we go, etc. In time, a minute passes in a minute's time, and thats the way it's always been observed.
I just stopped time. For a million years. Didn't notice? well that's because time was STOPPED. And just after typing that sentence time actually ran BACKWARDS for 5 minutes and then went forwards again. Again, sadly, nobody was able to notice. Now, prove this didn't happen.
As has already being pointed out, time behaves very differently depending on your speed and on the gravitational field you are in.