Excessive yawning, often dismissed as mere tiredness, can signal underlying health issues. It may indicate sleep disorders, fatigue, or even heart and neurological problems. Iron deficiency and poor ...

Yawning is usually brushed off as a harmless sign of sleepiness, boredom, or lack of focus. In truth, it plays an important role in regulating brain alertness and oxygen levels. While the occasional ...

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 ...

Have you ever wondered why yawning is contagious? It may be a way to bond with your fellow human being, but scientists have other theories. We’re one sentence into this story and I’ve already yawned ...

It happened this past week -- a yawning gap in our knowledge filled at last. Humans do it ... chimps do it ... even educated dogs do it. We all do it: We all tend to start yawning when we see, or even ...

Last week, while my daughter was in the middle of telling me a very important story, I did something very rude. I just couldn't help it. I opened my mouth and inhaled a giant involuntary yawn. Was I ...

First we were told yawning meant we were tired. Then it was claimed yawning was the body's mechanism to keep us awake. Now a new study says yawning cools the brain. The research, led by psychologist ...

A little levity wouldn’t go astray. I mean, don’t you think? Things can get too serious in the halls of our great art museums. Thank God for those Dutch paintings showing drunkards falling about in ...

Chances are you read this sentence about yawning and you yawned. Right? Well, a new study suggests that you may not really be yawning because it’s contagious, or you’re bored or tired. You’re actually ...

We all know what a yawn looks like: The jaw opens wide, with a deep inhalation, and then breathing halts for a hiccup of a moment. Then, a forced exhalation sends air rushing out, often with that ...

Confidential list of behaviors watched by TSA agents was recently leaked online. A TSA document lists exaggerated yawning as a suspicious traveler behavior. Getty Images — -- Excessive yawning, ...