00:01On this day in space.
00:03On March 1, 2016, NASA astronaut Scott Kelly came back to Earth after spending almost an entire year at the
00:09International Space Station,
00:10breaking the record for the longest spaceflight by an American.
00:13He and his Russian crewmate, Mikhail Kornienko, spent 340 consecutive days at the space station.
00:19During that time, Scott Kelly took part in NASA's twin study with his twin brother, Mark.
00:24His extended stay in space would help researchers learn about the health effects of long-term spaceflight.
00:28And that's what happened on this day in space.
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