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On March 1, 2016, NASA astronaut Scott Kelly came back to Earth after spending almost an entire year at the International Space Station, breaking the record for the longest spaceflight by an American.

He and his Russian crewmate Mikhail Kornienko spent 340 consecutive days at the space station. During that time, Scott Kelly took part in NASA's twins study with his twin brother, Mark. His extended stay in space would help researchers learn about the health effects of long-term spaceflight.
Transcript
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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