Why Do Humans Yawn When They’re Tired?

Yawning is like a magic breath that helps you feel more awake when you're sleepy. When someone yawns near you, it makes your brain want to join in too. It's kind of like sharing tiredness or energy with others.

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Examples

A tired student yawns after falling asleep in class, and their friend starts yawning too.
You see your mom yawn on the couch, and suddenly you feel sleepy and yawn as well.
After watching a movie that made you bored, you let out a big yawn and don’t know why.

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Categories: Health · yawning,sleep,brain function,contagious behavior,neuroscience