A simple yawn may feel like the most ordinary of human acts—a reflex triggered by tiredness, boredom, or seeing someone ...

(Anna Cinaroglu/Moment/Getty Images) Yawning has an unusual and unexpected effect on the flow of fluid protecting the brain, ...

It's hard not to take other people's yawns personally, especially when you're in the middle of telling them a story. Longstanding beliefs, and evidence, suggests that drowsiness, which often follows ...

New research reveals yawning does more than signal tiredness. Scientists observed that yawning causes cerebrospinal fluid to ...

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 ...

Contagious yawning isn’t a myth. It’s a real, scientifically demonstrable phenomenon. We yawn when we see someone else yawn. The sound of yawning makes us yawn. The yawning contagion can even spread ...

Yawning in the womb may be the unborn baby showing distress, according to new research. Fetuses can - and do - yawn in the womb, where all oxygen is provided by the placenta, scientists say. Now, a ...

By copying each other's non-verbal behavior, we gain access to what others think and feel. In psychology, this is known as ...

Why are people judged negatively for walking faster or slower than the pedestrians around them? Why is creativity viewed as sexier than intelligence? Why do dads joke about harming boys who have a ...

"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 ...