Cast List: What makes us yawn?

What makes us yawn?

Stuff You Should Know

Episode: What makes us yawn?
Website: Stuff You Should Know
Feed URL: http://www.howstuffworks.com/podcasts/stuff-you-should-know.rss
Duration: 00:32:36
Published: 2013-04-25 19:03

What is it that makes us suddenly draw in a deep breath through a wide-open mouth? researchers really don’t know. Whether the answer is physical, mental or even contagious there is pretty much no chance you won’t yawn during this episode.

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