Yawning is contagious, but not everyone "catches" a yawn.
| | | Science | | Why Are Yawns Contagious? | | Around 60-70% of people yawn if they see someone yawn in real life, look at a photo of a yawn, or even read something about yawning (like this article). | | | | | | | |  | | READ THESE | | | | | | | | | | | | | | You are receiving this newsletter because you subscribed to the Today I Learned newsletter.
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