Ever noticed how one yawn can trigger many? Science reveals how your brain copies others, why yawns spread so easily, and ...

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Ever notice how you automatically yawn when someone else does it? That involuntary mouth-stretching moment isn’t just your brain being lazy. It’s actually broadcasting something pretty revealing about ...

Here's a challenge: Try to read this whole page without yawning. Even reading the word yawn might be enough to set you off. But why do we yawn in the first place? And why do we 'catch' other peoples'?