most of you are probably already aware of the idea of time dilation...
time dilation; the faster you move, or the greater your proximity to large masses: the rate of time will proportionally decrease(with respect to a datum position in space/time)
so the 'edge of the universe' seems more plausible; lets pretend that you had a 'perfect' space suit: if you were to approach the edge of the universe, statistically there would be fewer masses floating around and in this sense, the closer you get to the edge than the slower time would pass; and eventually you would reach a state where the rate of time(again with respect to the datum) would reach a lower limit, where it exists only because of your own mass. (so you could never physically cross over the edge; to the claustrophobic: this means we are trapped!! haha)
