Why Yawning Is So Contagious
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Channel: Brainiac
Views: 116,375
Rating: 4.8853045 out of 5
Keywords: Brainiac, Yawning, Yawn, Yawn benefits, Yawn facts, yawning effect, yawning explained, yawning contagious, yawning too much, why do we yawn, chemical reaction, cools down brain, empathy causes yawning, brain overheating, body reaction
Id: knN3oqHZ17M
Channel Id: undefined
Length: 5min 6sec (306 seconds)
Published: Tue Dec 17 2019
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