Scott Kelly Returns to Earth, but Science for NASA's Journey to Mars Continues (IMAGE)

NASA/Johnson Space Center

Scott Kelly Returns to Earth, but Science for NASA's Journey to Mars Continues

Caption

One-year mission crew members Scott Kelly of NASA (left) and Mikhail Kornienko of Roscosmos (right) celebrated their 300th consecutive day in space on Jan. 21, 2016. By spending a total of 340 days aboard the International Space Station, the astronauts help scientists understand what happens to the human body while in microgravity for extreme lengths of time. Kelly is holding a zinnia grown in space as part of the Veggie experiment on the International Space Station.

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