Lots of cool things coming in the 3d printing field. Printing with metal, huge printers, etc. very exciting stuff.

2012 has been a big year for 3-D printing, but the industry has quietly been growing for decades. And the innovations are impressive — for every new plywood-clad 3-D printer kit that makes the rounds on the internet, engineers are developing ways to print titanium parts for jet engines that will change the aerospace industry.