宇宙138億年，為什麼還是沒遇到外星人？三種硬核新解釋
Synopsis
宇宙有138億年歷史、幾千億個星系、上萬個類地行星，我們卻始終沒遇見任何外星文明。是不是宇宙真的只有我們？這支影片從費 ...
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