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How Contagious Yawning Works

June 3, 20086 min
Yawning is contagious, but why? Check out the leading theories on contagious yawning and empathy in this HowStuffWorks podcast.Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices