Astronaut Spends 340 Days In Space and Returns to Earth Younger

NASA Astronaut Scott Kelly returned to Earth after an impressive 340 days in space and was reported to be two inches taller, and more incredibly, 8.6 milliseconds younger than he would have been having remained on planet Earth. While the former was due to zero gravity and its lack of exertion of force on the body's spine -- which has the potential of stretching out an additional three inches within that environment -- the decrease in age, although already established as a discovery in science, i...