Evolution favours the body form best adapted to the local environment, but it can also favour rare forms. Stickleback experiments reveal how these two selection forces can interact, and how this can limit population divergence. See Letter p.285
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Daniel Berner (adapted)
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Reznick, D., Travis, J. Differences can hold populations together. Nature 546, 218–219 (2017). https://doi.org/10.1038/nature22502
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DOI: https://doi.org/10.1038/nature22502
