Here's a challenge: Try to read this whole page without yawning. Even reading the word yawn might be enough to set you off. But why do we yawn in the first place? And why do we 'catch' other peoples'?

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 ...

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.

Studies suggest the jaw stretching movement and contagious nature of yawning could provide some health benefits.

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Since antiquity, we’ve pondered the purpose behind the yawn, and developed a plethora of both social and scientific theories. A ...

The study bolsters the existing idea that yawning likely serves a specific purpose. It’s something to consider next time you give in to a yawn, or to the urge to get your dog to yawn along with you.

If you're sat in the classroom and someone sneaks out a yawn, do you find yourself yawning too? Research from the University of Pisa, in Italy, say contagious yawning isn't just a human thing - horses ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Compare all the biological quirks of the average human, and the act of yawning—also known as ...