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 ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

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 ...

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 ...

"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 ...