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 ...

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 ...

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 ...

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 ...

The average adult yawns about 20 times a day. But why? Surely we can’t all be that tired. The truth is, the science behind yawning is more complex than just a few hours too little sleep. Even more ...

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 ...

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 an automatic body response to tiredness or stress. Less commonly, excessive yawning can also be a sign of an underlying health condition. It can be related to the vagus nerve, sleep ...

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 ...

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, ...