The science behind yawning and its mysterious behavior

It's something we all do, but why? Behavioral biologist Andrew Gallup joins "CBS Mornings Plus" to explore the science behind yawning.

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The science behind yawning and its mysterious behavior

Topics

Related

Taiwan Is Getting Its U.S. Weaponry---but Years Behind Schedule

Why fish, birds and other animals yawn too, according to an expert

Gaetz defends ‘embarrassing’ past behavior, fires shot at Ethics report

Trump calls Canadian minister's behavior 'totally toxic'

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