Yes we know they created the 3D printer, but do we know that this technology was just the beginning of NASA’s idea to create a 3D printer to build structures on the surfaces of the moon. The calls “contour crafting”, technique pours out layers of composite construction while robotic trowels smooth them out to any angle desired. The printer is also usable on earth, especially in places that need rapid building such as disaster areas or third world slums.