Watch the video above. Did you yawn? Contagious yawning occurs when someone around you yawns and you yawn in response. It's an involuntary response. Humans do it, and so do chimpanzees. In chimps, ...

Why do we yawn? Yawning is a universal gesture. Everyone yawns, from babies still in their mother's womb to the elderly. However, the exact reasons for this reflex are not well understood. Is it just ...

Yawning is a phenomenon that has been observed in humans and animals, and, despite its prevalence, it remains poorly understood in humans. Yawning happens reflexively. When you yawn, you take in a ...

A yawn is an involuntary reflex that involves opening the mouth wide and taking in a deep breath, followed by a slow exhale. Several theories exist about why we yawn, but researchers have not proven ...

Johanna Simkin does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Ever notice how you automatically yawn when someone else does it? That involuntary mouth-stretching moment isn’t just your brain being lazy. It’s actually broadcasting something pretty revealing about ...

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Yawning seems like such a simple act, yet it holds surprising power over us. Just watching someone yawn — even a stranger — can suddenly trigger the irresistible urge to yawn yourself. Why does this ...