For years, the potential of 3D printing has made tech geeks drool, but now we're finally starting to see the technology graduate from a mere novelty into a highly useful tool. Take, for example, the story of the 5-year-old boy who was born without fingers on his right hand but recently received a 3D-printed prosthetic hand. Thanks to its quick turnaround speeds, the technology also enables scientists to test multiple designs at once. For example, in Australia researche
