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Humans lose muscle when we don't use it, but squirrels can gain muscle during winter hibernation -- thanks to their gut bacteria. Learn more in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/squirrels-get-jacked-during-hibernation-news.htm

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https://www.listennotes.com/e/1d249b47916a40d2a9ea1409097b5336/