Today is Monday and it’s likely you have yawned once this morning, which likely triggered someone else to yawn as well. YouTube user Vsauce takes a closer look at what makes us yawn and why yawning is contagious. Yawning cools your brain, increases blood pressure, stretches faces muscles and increases focus. When one person yawns it is then transferred through empathy and through emotional contagion, or the ripple effect. Just try and watch this entire video without yawning.
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