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NASA space mission Kelly twins orig_00002025
NASA space mission Kelly twins orig_00002025

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    What happens during a year in space?

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What happens during a year in space?

NASA astronaut Scott Kelly will spend 342 days on the International Space Station. CNN's Rachel Crane explains how this may impact his body and mind.

What happens during a year in space?

NASA astronaut Scott Kelly will spend 342 days on the International Space Station. CNN's Rachel Crane explains how this may impact his body and mind.