Ever been in a boring meeting extra long class or just been simply tired and sleepy? You must have noticed that when you yawn a few others do too. Well yawning is believed to be contagious. And this is not simply a myth. Here is exactly why. Yawning is an action that is controlled by our hypothalamus. When we yawn our sinuses contract lungs open up and we breathe in deeply. Although why we yawn is not yet known it is believed that it is our body's way to cooling itself internally. But ever wondered why we yawn when others
