How Do Some Squirrels Gain Muscle During Hibernation?

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 Learn more about your ad-choices at https://www.iheartpodcastnetwork.com