33. Have a Heart
Scientists are currently growing the following in labs: bladders, ears, tear ducts, coronary arteries, blood vessels, urethras, a wind pipe, cartilage, heart valves, fully functioning rat kidneys, and a nose for a man who lost his to skin cancer. Up next: human kidneys, livers, and—the holy grail—a heart. Explains Anthony Atala, MD, director of the Wake Forest Institute for Regenerative Medicine, "We take a tiny piece of the failing organ, tease out the cells, multiply them, place them on a scaffold model, put it in an ovenlike device, and in four to six weeks have a brand-new organ that can be implanted with zero risk of rejection." To which we say: Wow.