Scott Kelly Spent a Year in Space and Now His DNA Is Different From His Identical Twin's Astronaut Scott Kelly, who spent a full year in space as part of a groundbreaking NASA mission, is no longer an exact genetic match with his identical twin brother Mark Kelly, according to a new study. - 편입영어 / 공무원영어 - 어휘 astronaut 우주비행사 groundbreaking 획기적인 identical twin 일란성 쌍둥이 match with ~ 와 일치 - 편입영어 / 공..
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