Why Do Humans Yawn?

Yawning is like a special kind of deep breath. When you yawn, your body takes in more air and stretches your jaw, which helps relax you. Sometimes, if someone near you yawns, it might make you want to yawn too, that's why it feels contagious!

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Examples

A person yawns in class, and their friend starts yawning too.
After a long day of work, you stretch wide and take a deep breath, that's a yawn!
Your dog sees you yawn, and suddenly he does it too.

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Categories: Health · yawning· human behavior· neurology· contagious yawning· brain activity