SYSK Selects: What Makes us Yawn?

What is it that makes us suddenly draw in a deep breath through a wide-open mouth? The beautiful thing about yawning is that 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 classic episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com