Humans “rust” as well. As the cells in our bodies lose the ability to attract oxygen, Szent-Györgyi wrote, electrons within them will slow and stop freely interchanging with other cells, resulting in unregulated and abnormal growth. Tissues will begin “rusting” in much the same way as other materials. But we don’t call this “tissue rust.” We call it cancer. And this helps explain why cancers develop and thrive in environments of low oxygen.28 The best way to keep tissues in the body healthy was to mimic the reactions that evolved in early aerobic life on Earth—specifically, to flood our bodies
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