But the paradox is only a paradox under special relativity, which couldn't initially explain why one reference frame would be prefered over the other, accept by noting that one of the twins underwent acceleration (that was bouncing around somewhere near 1910). That brought up the question of why an acceleration should matter, and given that acceleration and gravity are the same thing to the twin (he can't tell which is which inside a sealed box), gravity must be doing something weird to time, too, leading to general relativity. The twins paradox isn't a paradox under general relativity because it explained why it occured (thus no longer a paradox), but the fact that the twins clocks don't match was apparent in special relativity, where it of course created a paradox (all reference frames are not equal - but they are - except they're not - damn). The interesting thing about this new warp drive is that the twins paradox doesn't occur because their clocks stay the same. Both twins stay in a non-accelerating inertial reference frame the whole time. There's no time-dilation for either of them, just a seperation of distance (along with the doppler effect of moving relative to the transmission speed of a whatever they use to send signals back and forth). Whenever they meet up, their clocks will still be in sync.