주시하고 있는 사람들

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  Claudia Postle

  https://sciencealert.co.uk/%EC%97%90%EB%B3%BC%EB%A3%A8%EC%85%98%EC%B9%B4%EC%A7%80%EB%85%B8-%EC%B5%9C%EC%8B%A0-%EA%B2%8C%EC%9E%84-%ED%98%81%EC%8B%A0%EC%A0%81%EC%9D%B8-%EB%8F%84%EB%B0%95-%EA%B2%BD%ED%97%98%EC%9D%98-%EC%84%B8/