Scott Kelly’s Body Endured Another Surprise in Space – Newser

(Newser)
They called it the “perfect nature versus nurture” experiment: Astronaut Scott Kelly was sent to the International Space Station for nearly a year, while his identical twin, astronaut and now Sen. Mark Kelly, remained on Earth. When Scott Kelly came back home in March 2016, scientists compared his DNA and body makeup to that of his twin and found Scott was 2 inches taller than he’d been and boasted a lower body mass, among other changes (most of which have since reverted). Now, per a study…

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