Have you ever wondered what makes you yawn everyday? And why do we yawn just because we see someone else does. Overall, what is the meaning of yawning, and how does it happen?
Surprisingly, to scientists, this is still a mystery. However, scientists claim that yawning is not because of boredom. There are some hypothesis made by various scientists. Some say that we yawn because our body needs oxygen. That explains the fact why we open our mouth widely so that the lung can get more oxygen, which leads to the increasing rate of heartbeat, creating more oxygen in the bloodstream. Yet again, this theory is skeptical since we do not usually yawn when we're doing exercise, for exercising needs lots of oxygen as well.
Therefore, the answer is yet to be found. What does only one simple word can make it so complicated for scientists? Let's share what you think. I hope WE can find the answer!
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