Does growing body parts sound entirely impossible and slightly insane? Turns out it’s not only possible, it’s actually happening in laboratories today. Check out this CBS News story about growing organs — apparently a lab at Wake Forest University has grown an entire beating sheep’s heart. Crazy, right? They even regrew a severed human finger by sprinkling on some witch-y sounding pig bladder powder, and believe it’s only a matter of time before they are able to grow an actual human heart. Growing tissues outside the body has significant implications for organ transplant patients, most of whom linger on transplant lists for years, waiting for a heart, liver or lung. Scientists involved with regenerative medicine believe that all organs can re-grow, they just need a signal to tell the cells how to do it.