Why We Yawn

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Why We Yawn There are things we do on a daily basis and we don't know the reasoning. Have you ever wondered the reason why we yawn ,and why it's contagious? Researchers have been studying the reasoning behind yawning and have come up with plenty of reasons why this may take place in our everyday lives. One may yawn when they are tired, or one may yawn when they see someone else do it. It is believed that it expresses how tired we really are. Although that is what majority of us think is the true reason why we yawn, it may not be for some of us. It has been linked to heart disease, number of brain diseases, spinal cord issues, lack of oxygen, and of course fatigue. You often find yourself yawning when you see someone else yawn, or if you're feeling tired. Cooling of the brain is a theories that some researchers have found is the reasoning of yawning. There is many different of theories of why we do this. We as people are not the only ones who do it either. Animals also yawn due to the same reasons. The reason why we yawn has always been a weird thing, and has always made me curious making me wonder why. Yawning is something we all do, and we all thing that it at least has something to do with us being tired. Researchers have been after this topic, but have yet to get any proof on why this takes place. There are many of theories out there, but little proof. We don't only do it because we are tired. That is what most people think happens. When we are tired we begin to yawn. Some researchers believe that shallow breathing could cause the yawning effect to take place. Sarah Klein states in her article "In cases of surgery patients, some have been known to lose lung function after developing pneumonia due to shallow breathing after anesthesia." Expressing that with the shallow breaking often comes the yawn. That could be the reason we yawn when we get tired. It's

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