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Mark Kelly

Astronaut Scott Kelly tests his fine motor skills as part of his year-long mission on the International Space Station. This task tested Kelly's ability to use his fine motor skills: pointing, dragging, copying a shape, and rotating - on an Apple iPad, after extended time in space. Image courtesy of NASA.

Reversible genetic changes were discovered in astronaut Scott Kelly who spent a year in space compared to his brother Mark who remained on Earth

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