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Two Key Things Astronaut Scott Kelly's Body Will Teach Us About Living in Space

We’re all looking forward to interstellar travel and colonizing Mars, but first, we’ve got a lot to learn about how the human body responds to the cold dark void of outer space. Scott Kelly’s stint on the ISS, which ends tomorrow, is helping us answer some critical questions—including what weightlessness does to our…

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51 Favourite Photos from Astronaut Scott Kelly's First Six Months in Space

Commander Scott Kelly is halfway through his year in space today. While his body is slowly degrading into a mess of bulging eyeballs and atrophied muscles, his artistic sensibilities are being kept in shape with an endless array of gorgeous settings to photograph for our vicarious viewing pleasure.