Humans aren't alone when it comes to yawning — all vertebrates do it. But why? An expert explains the likely reason behind this "evolutionarily ancient" act.

Studies have shown that we yawn when we are fatigued, as well as when we are awakening, and during other times when the state of alertness is changing. You are correct in thinking that yawns are ...

Contagious yawning or yawn-mimicking behavior is common in humans, monkeys, and now dogs. Mimicking behavior is generally a subconscious emotional response that is driven by a close connection, so ...

What does yawning say about you and your body? We’ll tell you why it happens, what it says about empathy, and how to stop yawning.

Yawning has puzzled scientists for more than two millennia. But could a new theory settle the question once and for all? David Robson investigates.

Yawning robot made chimps want to get ready for bed The researchers began the experiment by creating a life-sized silicon human head equipped with a motorized, movable mouth.

But, now, a new science may explain why people yawn, and even crack one of the world's most mysterious phenomena — the contagious yawn. Some people think yawning stems from a need to stretch or ...

The results: The longer the yawn, the bigger the brain tended to be. The strongest correlation was between yawn duration and brain complexity, as judged by the number of neurons.

It displays LED emoticons that supposedly react to external stimuli, such as a smile when the wearer shakes hands with someone.

A young chimpanzee will yawn when a human does, regardless of whether the face is familiar, according to a study that suggests contagious yawning grows stronger in our primate cousins as they grow ...

Sometimes it took multiple days just to get one good Yawn. Thanks so much for watching and sharing. On a side note, if anyone is looking to pay someone to yawn around the world, I'm readily available.