So why do we do it then? Well, new research suggests it might be because yawning cools the brain down and prevents it from overheating, much like the fan in your laptop. So, why do we yawn when tired?

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.

While researchers aren’t quite clear why yawning happens, we do know it can be triggered by a variety of factors, many of which have nothing to do with our energy levels. And in some cases ...

Why Do People Yawn More When They Feel Tired A tired ... While it is a completely natural and ubiquitous behaviour, the ...

It’s almost impossible not to yawn after seeing someone else do it, but most of us probably ... on in our bodies and brains when we are yawning, and why is it so hard to stop?