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How Beauty Is Making Scientists Rethink Evolution

Although never completely forgotten, Darwin’s theory of beauty was largely abandoned. Now, nearly 150 years later, a new generation of biologists is reviving Darwin’s neglected brainchild. Beauty, they say, does not have to be a proxy for health or advantageous genes. Sometimes beauty is the glorious but meaningless flowering of arbitrary preference. Animals simply find certain features — a blush of red, a feathered flourish — to be appealing. And that innate sense of beauty itself can become an engine of evolution, pushing animals toward aesthetic extremes. In other cases, certain environmental or physiological constraints steer an animal toward an aesthetic preference that has nothing to do with survival whatsoever. These biologists are not only rewriting the standard explanation for how beauty evolves; they are also changing the way we think about evolution itself.

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