I'm writing a sci-fi novel ("You don't say?") and I've decided that the only method of interstellar travel that will exist is wormholes. I've debated a warp drive that doesn't reach the speed of light, but I'll save that for another time. Basically, I need to know what properties matter would need to create a wormhole. The idea of the wormhole will be that by shortening the distance between star systems, you can travel interstellarly (real word?) without having to reach the speed of light. I'm new to theoretical physics, but I'm very much fascinated by it. Other than how the matter would be used to create the wormhole, I want to know what more basic properties it would have, as in, what would it look like? What would happen if you were to apply force to it? Is there any way it could be contained or manufactured?