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Caption: By controlling the pH of the reaction we can first grow coral structures that evolve away from each other. When we subsequently lower the pH, the growth fronts grow toward each other and merge to form spirals. This image relates to a paper that appeared in the May 17, 2013, issue of Science, published by AAAS. The paper, by Wim L. Noorduin at Harvard University in Cambridge, MA, and colleagues was titled, "Rationally Designed Complex, Hierarchical Microarchitectures."
Credit: [Image courtesy of Wim Noorduin]
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