You're quite right, Slacker. Clocks at higher altitudes do run a tiny bit faster relative to clocks at lower altitudes. Einstein's theory of relativity explains this all very well, but it was actually tested in the mid 1970s with two hydrogen maser clocks. One was on the ground and one was fired up in a rocket to a height of about 10,000 kilometers. As the rocket ascended, radio transmissions were sent back to the ground with data from the clock. Many calculations had to be made to allow for the warps caused by the rocket's changing acceleration and the decrease in gravity and the time it took for the transmission to travel, but the results proved conclusively that the clock in the rocket ran measurably faster than the clock on the ground. Measurably, in this case, means about four parts in ten billion. As for Star Trek's FTL travel, their "warp" travel eludes the dilation effect because of the way it warps space around the vessel and because of the mythical "inertial dampeners" that do some weird stuff with acceleration. I used to know how all that worked and actually participated in a few debates about the theories, but most of it was just hogwash. Bleh!