@CNN: 7% of astronaut Scott Kelly’s genes did not return to normal after his return to Earth two years ago, according to preliminary results from NASA’s Twins Study https://t.co/3WmZk3zdW5 https://t.co/6Y0SvW60F3

7% of astronaut Scott Kelly's genes did not return to normal after his return to Earth two years ago, according to preliminary results from NASA's Twins Study https://t.co/3WmZk3zdW5 pic.twitter.com/6Y0SvW60F3

— CNN (@CNN) March 15, 2018