In my heart-of-hearts, I’ve long suspected that some Earth scientists believe in magic. What other explanation accounts for our reflex to leap to a global cause for extraordinarily complicated phenomena from a tiny handful of experimental data? Remember our fascination with the one activated complex to explain the dissolution of all aluminosilicate minerals? Best forgotten. If we don’t cleave to magic, then at least some of us hope for it. Perhaps our urge to leap ahead is natural because of the complexity of Earth materials and because there are so few of us. Certainly among the most complicated of reactions,...

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