Scientists develop an 'elixir' that reverses a known cause of aging

Scientists develop an 'elixir' that reverses a known cause of aging: "To date, we know of only two things that can reverse the effects of aging: caloric restriction and extensive exercise. But in a recent experiment, researchers applied a new compound to 2-year old mice, causing their muscles to regenerate to 6-month old levels. Incredibly, human trials may start next year."