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2021 marks the 100th anniversary of the fundamental discovery spoken of in every biochemistry textbook. 100 years ago, German physician Otto Warburg noticed that cancer cells obtain energy from glucose sugar in a strangely inefficient way: instead of burning it off with oxygen, cancer cells do the same thing as yeast – they ferment glucose. The anaerobic process is very fast, but also very inefficient: most of the glucose energy remains unused. …