国際宇宙ステーションのインスタグラム(iss) - 2月22日 09時08分

Happy Birthday to twins NASA Astronaut Scott Kelly​ (@スコット・ケリー) and former NASA Astronaut Mark Kelly​, one on Earth and one in space.
Scott is spending a year on the space station while Mark stays on Earth. Since their genetic makeup is as close to identical as we can get, this allows a unique research perspective. We can now compare the results from Scott Kelly in space to his brother Mark on Earth. #twinning
#HappyBirthday #HBD #twins #twin #NASA #science #research #space #YearInSpace #JourneyToMars

Photo credit: TIME

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• スコット・ケリー