Perhaps one of the oldest dreams of a science-fiction future is the ability to create something where once there was nothing. If we could create solid, stable objects out of thin air, the idea of ...

3D-printed guns are a growing threat to public safety. The blueprints used to make these firearms can be found online, making them easily accessible. With a relatively cheap 3D printer and a quick web ...

For a couple of years now, I’ve been trying to find an excuse to buy a decent 3D printer. Friends and fellow Ars staffers who had them would gush about them at every opportunity, talking about how ...