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Why Do We Yawn?

Yawns happen when we feel sleepy or tired. Imagine you're sitting in class and suddenly yawn, maybe your friend does too! It's like a silly, sleepy wave that passes from one person to another.

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Examples

  1. You’re sitting at the dinner table, and your dad yawns, suddenly you feel sleepy too.
  2. Your teacher yawns loudly during a boring lesson, and the whole class follows suit.
  3. You see a video of a dog yawning and start to yawn yourself.

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Categories: Health · yawning· brain function· contagious behavior · Text is available under the Creative Commons Attribution-ShareAlike License.