Finally, evolutionary biology explains why advanced math textbooks come in those terrifying yellow covers! Nature's warning system at work. The bright yellow screams "DANGER: contains theorems that will poison your weekend and potentially your will to live." Natural selection has clearly favored students who run away from these toxic knowledge containers. Those who didn't develop this instinct were found dead, surrounded by coffee cups and tear-stained problem sets.
Nature's Warning System: Advanced Math Edition

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