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	Podcast:		BrainStuff
	Episode:		What makes us yawn?
	Category:		Science & Medicine
	Duration:		00:04:41
	Publish Date:		2014-05-07 13:00:00
	Description:		Yawning is a universal human behavior, yet scientists still don't know exactly why we do it or what purpose it serves. Marshall Brain explores some of the theories behind yawning in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.
	Total Play:		0