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NASA @NASA
Our #Crew4 astronauts are set to head home this week—but they've spent a very productive six months on the @Space_Station. From studying human aging to growing plants in space, learn more about the @ISS_Research we're running in orbit: https://t.co/BfLdrjfqbC https://t.co/v7m8odzXre — PolitiTweet.org