Yawning—such an odd physiological phenomenon. Humans yawn, and so do dogs, monkeys, birds, and just about every known vertebrate species other than giraffes (yes, that is also odd). Over a decade ago, ...

Humans aren't alone when it comes to yawning — all vertebrates do it too, including fish, amphibians, reptiles, birds and mammals. But why? The "evolutionarily ancient" act of yawning likely serves a ...

A new study says that the size of a yawn can be used to predict to the size of one's brain. A new study says that the size of a yawn can be used to predict to the size of one’s brain. Researchers at ...

Humans’ first experience with yawning happens in utero, says Matthew D. Epstein, M.D., associate medical director of the Atlantic Health Sleep Centers in New Jersey. Yet, Earth-side, the ...

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Merely thinking about or seeing someone yawn can make you yawn (you’re probably yawning right now). Most people yawn because they’re tired, but it can also happen unexpectedly and without any triggers ...

Over a decade ago, at the Winter Olympics in Vancouver, yawning became a prominent sidebar story. Speed skater Apolo Anton Ohno, the most decorated American Winter Olympic athlete of all time, ...