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全员失业？移居火星？等待我们的是怎样的未来？
source link: https://tech.sina.com.cn/d/s/2020-05-01/doc-iirczymi9349493.shtml
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来源：我是科学家iScientist挺过2020，等待我们的是怎样的未来？假设有外星人存在，而且其中有一些外星人已经持续观察我们地球长达45亿年。它们会看到什么？在这漫长的时间跨度里，地球的面貌极其缓慢地发生着改变。大陆漂流，冰盖起伏不定，
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