根据对地核模型的研究，地球两极翻转看听上去不可能，可事实上有关地球两极翻转的证据已经第二次被人类发现。
Such fast flips are impossible, according to models of the Earth's core, but this is now the second time that evidence has been found.
研究人员现在正通过探寻外来微生物以寻找生命二次起源的证据，这些外来微生物的生化特性将不同于现有的所有已知生物。
Researchers are now seeking evidence of a second genesis by searching for exotic microbes that are biochemically different from all known organisms.
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