Imagine creating a mouse's heart by printing it out on an ink-jet printer. Using a spray to regenerate skin cells on burn victims. Growing a bladder in a petri dish. Or what about a special powder that could regrow an amputated finger, or even an arm or leg? This incredible medical technology may sound like the sort of thing you'd see on one of Zach Braff's Scrubs fantasies, but to our surprise, these cutting-edge procedures are completely real — CBS says so.