Abstract
Evolution Environmental adaptation is often considered a slow process. However, extreme events, such as heat waves or cold snaps, can produce rapid changes, both morphologically and genetically. Campbell-Staton et al. studied a population of green anole lizards during an extreme cold snap in the southern United States (see the Perspective by Grant). After the cold snap, the lizards showed greater cold resistance and displayed changes in six genomic regions that are important for regulation of function in the cold. Understanding how extreme climatic events influence adaptive potential will become increasingly important as the climate becomes more volatile. Science , this issue p. [495][1]; see also p. [451][2] [1]: /lookup/doi/10.1126/science.aam5512 [2]: /lookup/doi/10.1126/science.aao2067
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