Why do we yawn?
October 2, 2010 8:58am CST
Yawning is still a mystery until now, no one really knows why we yawn. Not only human beings yawn even animals does it too. I only noticed when I yawn everytime when i get sleepy. Some say we yawn when we ran out of oxygen or not enough oxygen. Others say it because of stress, where I could say true since it also happens to me when im bored or stressed out. Some are just contagious when one saw someone yawn, unexplainable it may seem but it happens to me too. Do you experience or do you also wonder why we yawn? Is there someone here could really explain why we yawn?
1 person likes this
2 Oct 10
yes, its more of like that, i usually caught myself when im stressed out and exhausted that leads me to feeling ill and sleepy i guess. i hope so... i just kinda wonder why they cant explain it when most of the people right now are more knowledgeable to science. coz even them only have theories but doubtful about it still.