I’ve written at length about teleportation and how it might be achieved (along with the virtues and perils of those forms of travel), but since I just finished rereading Dune, with instantaneous transport across the stars, I thought I’d talk a little bit about faster-than-light travel for transit through space.
The speed of light is a curious thing. As one approaches it, external time dilates (that is, expands) and your trip takes longer and longer to an outside observer. That means you can’t cross the speed limit because there literally isn’t enough time – it stretches out to infinity. So how then does one move around “faster than light”? Generally, we think of the teleportation solution (here one moment, there the next) and of the shortest-path solution (travel at normal speeds but take a shortcut). Of course, science fiction has come up with innumerable ways of defying the speed-of-light barrier but always by fiat.
In my head, I feel like we haven’t explored all the options yet, as a species. We aren’t really *exploring* them at all right now, but that has more to do with the building blocks of what’s necessary (you have to crawl before you can walk). Once upon a time, something smaller than an atom would have been inconceivable, and quantum mechanics would have been preposterous. There will be more scientific revolutions to come, and some of them may involve the potential for FTL technology.
(This problem interests me so much because I think the best solution to our world’s environmental problems is to find more worlds. Getting a species to slow reproduction seems a practically insurmountable problem, and without population control, we will one day outstrip this planet regardless of how green we can be. Gotta think long term!)