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Why do we yawn when someone else yawns?

Yawning is a familiar gesture. It often appears when one is tired or when changing states of alertness, for example at the moment of falling asleep or waking up. However, it has a unique aspect: ...
Yawning reverses cerebrospinal fluid flow, boosts brain blood surge, and may aid cooling and waste movement, challenging the idea that it signals boredom alone.
GREEN BAY, Wis. (WBAY) - Yawning is an interesting thing. People do it. Pets do it. Wild birds do it. Yawns are contagious: You’ll probably yawn if you see someone else do it. You might even yawn just ...
I have always liked how yawning feels and wondered what it’s for. I just read there is new information about how yawning affects your brain. Do you know anything about that? Also, do we know yet why ...
Dear Reader: We all yawn frequently, more often in the early morning and late evening. Does it mean we’re tired? Bored? Short on oxygen? As common as it is, we know little for certain about yawning.
Since antiquity, we’ve pondered the purpose behind the yawn, and developed a plethora of both social and scientific theories. A new study analyzing the CT scans of people yawning discovered that this ...
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 ...
Open your mouth wide, stretch the muscles of your jaw and upper body, take a slow breath in, and then exhale quickly. What have you done? You have yawned. Many animals, including humans, yawn. They do ...