If you lose your lower jaw to cancer, you don't have many options for prosthetics. At that size, traditional clay is so heavy and unwieldy that you can only wear it for a few hours at a time. Indiana University's Dr. Travis Bellicchi and team have developed a much better alternative, though. He recently gave tongue cancer patient Shirley Anderson a 3D-printed jaw after losing his natural jaw to the side effects of radiation treatments. The digitally-modeled piece is not only much lighter, but far more natural-looking -- the creators could create more natural borders and account for fine details like skin pores. The result is good enough that Anderson could comfortably wear the prosthesis in public without drawing significant attention.