The New York Times, April 11, 2019
For 340 days, Scott Kelly circled the Earth aboard the International Space Station, gathering data about himself.
He drew blood from his arms. He saved his urine. He played computer games to test his memory and reaction speed. He measured the shape of his eyes.
Two hundred and forty miles below, Mr. Kelly’s twin brother, Mark, who also served as an astronaut, carried out identical tests. Now, a comparison of these two men has provided a unique opportunity to learn what happens to the human body in space — down to the molecular level.
Continue reading “Scott Kelly Spent a Year in Orbit. His Body Is Not Quite the Same.”