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  "body": "\n## Summary\n\nA Turing pattern is a stationary, spatially periodic pattern that forms in a [[reaction–diffusion system|TAAHWE917M]] from an instability caused by diffusion.\nAlan Turing described the mechanism in 1952 in \"The Chemical Basis of Morphogenesis\".\nThe surprise is that diffusion, which usually smooths out differences, can destabilise a uniform state when two substances diffuse at different rates.\nTuring patterns are proposed as explanations of spots and stripes in animal coats and other biological patterns.\n\n## Explanations\n\n### L1 human\n\nThink of an activator that makes more of itself and of an inhibitor, and suppose the inhibitor spreads much faster.\nA small local excess of activator grows, but the inhibitor it produces spreads around it and stops growth nearby.\nThe result is a regular arrangement of peaks with a typical spacing, such as spots or stripes.\nWithout diffusion the mixture would stay uniform; the difference in diffusion rates is what creates the pattern.\n",
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