Astronaut Scott Kelly will become even younger than his twin elder brother (also an astronaut) Mark Kelly (born 6 minutes before Scott), by three milliseconds after the completion of his one year mission on the ISS.
fact
Astronaut Scott Kelly will become even younger than his twin elder brother (also an astronaut) Mark Kelly (born 6 minutes before Scott), by three milliseconds after the completion of his one year mission on the ISS.