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Mark Kelly

Mark and Scott Kelly

Full findings from NASA ‘Twins Study’ raise more questions about long stints in space

Ten research teams today shared comprehensive scientific results from an unprecedented experiment to gauge the health differences that developed between… Read More

Mark and Scott Kelly

Did space scramble Scott Kelly’s genes so much he’s no longer a twin? Um, not really

My Twitter feed was buzzing this week with reports that Scott Kelly’s genes were knocked permanently out of phase because… Read More

Scott Kelly on ISS

NASA astronaut Scott Kelly: I could spend another year in space, but I’m ready to come home

NASA astronaut Scott Kelly is getting ready to come home after spending a longer stretch in orbit than any other American in… Read More

NASA astronaut Mark Kelly on ‘Celebrity Jeopardy’ tonight

While Scott Kelly continues his “Year in Space” on the International Space Station, his twin Mark Kelly is on “Celebrity… Read More

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