Yawning more when tired may be linked to cooling the brain, regulating oxygen, and social bonding, all of which help combat ...

“Yawning often occurs when we’re tired – likely as a mechanism to increase oxygen intake and regulate brain temperature,” explains Dr Ann Nainan, a GP and founder of The Travelling Doctor.

Cue the yawn. The yawn is so much more than a signal of how tired we are. It’s also a symptom of boredom, an expression of rebellion, a facial workout, and an utterly contagious bodily function ...

Yawns have perplexed scientists for quite some time. Some say we do it to cool our brains while others think we yawn when ...

So, why do we yawn when tired? Yawning is sometimes associated with fatigue, and given that you’re more likely to feel drowsy in warm temperatures, the links appeared to make sense. Some tests ...

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