If you thought the idea of 3D printing houses was impressive, then how about a group of researchers in Sweden who are looking to 3D print houses out of cellulose? The researchers are looking into 3d printing doors, walls, and even complete homes out of cellulose based material, rather than simple concrete. The project looks to run until 2018 at which point a world expo will be held providing even more details. Read and see more at: http://3dprint.com/76838/3d-printed-cellulose-houses/