NASA is at it again with their 3D printing challenges. Only this time it is a HUGE one, in more ways that one. Teaming with America Makes, they will be giving away $2.25 million for those who can design and fabricate habitats using indigenous and recyclable materials hear on Earth, but that could also work on other planets. There are 3 legs of the competition, all of which are giving away some tremendous cash prizes. Read and see more on this at http://3dprint.com/66072/nasa-space-habitat-3d/