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Watch the video above. Did you yawn? Contagious yawning occurs when someone around you yawns and you yawn in response. It's an involuntary response. Humans do it, and so do chimpanzees. In chimps, ...

Yes. You’re probably going to yawn while you read this. Writing this piece, and reading research on yawning, I’ve been yawning nonstop, uncontrollably. And it's not because research on yawning is ...