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AlderaanDuran · 2974 days ago · link · · parent · post: Astronauts Back Home After A Year In Space : The Two-Way : NPR
The great thing about this, which the article mentions, is astronaut Kelly has a twin who stayed on Earth. So they can literally compare the health results and DNA of two identical people to measure the effects that a year in orbit had on one of them. The medical results that come from that are priceless.