Like layers in a pizza, each layer of material organization in Nature needs to be understood on its own terms and cannot be reduced to a base that explains the whole. iStockphoto.com hide caption

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Kind of cute. But pretty stupid. A scale model of a baby sauropod in its egg. Tim Boyle/Getty Images hide caption

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The United States Supreme Court: a temple to complexity and self-reinforcing feedback loops? Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images