Mikhail Korniyenko

…Year in Space,” Russian cosmonaut Mikhail Korniyenko and American astronaut Scott Kelly spent 340 days in orbit from March 2015 to March 2016. Kelly’s flight was the longest by an American. (Since Kelly’s brother, Mark, was his identical twin, as well as a former astronaut himself, scientists were able to…

Scott Kelly and Russian cosmonaut Mikhail Korniyenko, both of whom had spent 340 days in space to study the health effects of long-term spaceflight.