NASA Astronaut Grew 2 Inches In Space

NASA Astronaut Scott Kelly is back from spending 340 days in space, on the ISS, and has grown 2 inches in that period of time.

Kelly's trip to space was part of NASA's "Twin Study", which is a year-long investigation into the subtle changes that may have occurred to Scott Kelly, analyzed in comparison to his twin brother - Mark Kelly - who remained on Earth.

The study is comprised of 10 different investigations in total, but, most obviously, Scott Kelly is now 2 inches taller than his...

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