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Clip: Season 1 | 2m 11s Video has closed captioning.
Using data from identical twin astronauts Mark and Scott Kelly, NASA’s twin study is investigating the long-term effects of space travel on the human body. The results will be used to help get humans to Mars.
Aired: 03/02/16
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Want to know more about Expedition 46 and its crew members from Beyond A Year in Space? Visit the official website now for exclusive details on the mission, its objectives, and its members.
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