Vehicle designer Nir Siegel is working on a concept car that builds itself with the help of a 3D printer. While it's not a reality yet, this is clearly something we wouldn't want to fall into the wrong hands...or USB ports. There's already been concerns with humans 3D printing guns. Now imagine giving that ability to Skynet. And if I were a Cylon, you better believe I'd be interested in Deep Space Industries' vision of mining and 3D-printing outposts on asteroids.