What if a clinician could 3D print something through your skin, constructing an implant or replacement organ underneath layers of tissue? The world of medicine would be transformed: a host of surgical procedures, which come with a variety of risks, could be performed without ever lifting a scalpel. A collaborative, NIH-funded team is working to make this Star Trek-like fiction a reality. Their work, published today in Science, outlines a method to print biocompatible structures through thick, mu...