The science behind yawning and its mysterious behavior // TRAIN BRAIN

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.
Each weekday morning, "CBS Mornings" co-hosts Gayle King, Tony Dokoupil and Nate Burleson bring you the latest breaking news, smart conversation and in-depth feature reporting. "CBS Mornings" airs weekdays at 7 a.m. on CBS and stream it at 8 a.m. ET on the CBS News app.
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CBS Mornings

Each weekday morning, "CBS Mornings” co-hosts Gayle King, Tony Dokoupil and Nate Burleson bring you the latest breaking news, smart conversation and in-depth feature reporting. Watch "CBS Mornings" on weekdays at 7 a.m. ET on CBS and stream it at 8 a.m. E...

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