Extreme Spaceflight: The History of Yearlong Space Missions

An astronaut and a cosmonaut are wrapping up a nearly yearlong mission on the International Space Station (ISS) today (March 1), the longest in the 16 years since humans began continuously occupying the orbiting outpost. But Scott Kelly and Mikhail Kornienko's 340 days in space place only fifth on the list of the longest spaceflights of all time, coming in behind four cosmonauts' previous missions to the former Russian space station Mir. Launched on March 27, 2015, Kelly and Kornienko will land