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How Contagious Yawning Works

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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.htm

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0:07:23
Издател
Stuff You Should Know
Поредица
Stuff You Should Know
Година на публикуване
2008
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