Astronaut Scott Kelly will spend a year in space while scientists study his twin here on Earth

Lindsey Bever, The Washington Post, January 16, 2015

NASA’s Twins Study, which looks at how twins in radically different environments change over time, will be comparing brothers Scott and Mark Kelly’s immune systems, reaction time, vision and heart health, among other things, to tell them how Scott Kelly’s DNA might have changed in space. […read more]