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人类的起源 (梅利莎·尼尔逊和约翰·格里姆)

Course video 14 of 32

我们讨论了20亿年前的氧气危机,细胞内共生这一创造性方案解决了这个问题。我们还讲了现在这个时代的次贷危机,警惕他们再次发生。

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