Turing’s ideas have staying power, even decades after he proposed them. But he didn’t have all the information, and evolution layered complexity over his simple activators and inhibitors. “The Turing ...

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A mixture of two types of pigment-producing cells undergoes diffusiophoretic transport to self-assemble into a hexagonal pattern. Credit: Siamak Mirfendereski and Ankur Gupta/CU Boulder A zebra’s ...