For centuries, adventurers and scientists have believed that not only could we delay death but that "practical immortality" was within our reach. Today, many well-respected researchers would be inclined to agree. In a book that is not about anti-aging, but about functional aging--extending your healthy, active life--Dr. Sanjay Gupta blends together compelling stories of the most up-to-date scientific breakthroughs from around the world, with cutting-edge...