Datalord said:
Well, einstein hypothesized that if you approach light speed, time slows down, but to my knowledge, this is only the theory that currently makes the most sense, and hasn't been verified with an experiment,
In short, we think not
Actually, this was verified. I can't quote any sources, unfortunately, it was a long time ago, but scientists placed two perfectly synched clocks, one on the ground and one on the fastest supersonic jet then available. They had the jet fly around as fast as it was able (still a ridiculously small fraction of the speed of light) and when they looked at it again, the jet clock was a tiny fraction of a second behind the control clock.
Like I said, it was a long time ago, so I may have fudged some of the details. Anyone recognize this experiment?