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Lizards Have Hit An Evolutionary Dead End In The Race Against Climate Change

You would think that with so many brown anoles covering so much of the planet there would be a lot of genetic variation within the species. Some lizards would be larger or smaller, faster or slower, lighter or darker — meaning that, by chance, a few anoles here or there would be adapted to new challenges, like climate change, and they would pass on these traits to a younger generation of climate-tolerant lizard. But new research suggests that isn’t happening.