How 3D Printers Could Feed Astronauts and Mine Asteroids - Out There

How 3D Printers Could Feed Astronauts and Mine Asteroids - Out There | Discovermagazine.com: "Strip away all the hype, and 3D printing is fundamentally a simple idea: apply a material to a surface in a controlled pattern, and then keep repeating one layer after another until you have built the desired form, as described in more detail here. Although most 3D printers create objects out of simple structural materials such as plastics or metals, there’s no reason why you couldn’t build using a different material…like food."