Sharon Levy is a science writer based in northern California. Her work appears in Undark, BioScience, Nature, and other magazines. She is the author of Once and Future Giants: What Ice Age Extinctions Tell Us About the Fate of Earth's Largest Animals.
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Swamps and marshes once covered vast stretches of the North American landscape. The destruction of these habitats, long seen as wastelands that harbored deadly disease, accelerated in the twentieth century. Today, the majority of the original wetlands in ... SEE MORE