I haven’t kept you up to date on the new things going on with 3D printing- you know, where you can “print” a real object. Sometimes called rapid prototyping, sometimes called additive layer manufacturing, these “printers” can use cells (as in living things), plastics, or other materials to construct the desired shapes or objects. The objects are “built up” by printing very thin layers repetitively- of the same material or different materials (to yield flexibility, strength, implantation, etc.) until the desired thickness is achieved.