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Today I Learned@lemmy.worldEnglish · 1 year ago

TIL yawning is observed in almost all vertebrate animals and is "contagious" across species. There is no consensus on why yawning occurs.

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TIL yawning is observed in almost all vertebrate animals and is "contagious" across species. There is no consensus on why yawning occurs.

en.wikipedia.org

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Today I Learned@lemmy.worldEnglish · 1 year ago

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Yawn - Wikipedia

en.wikipedia.org

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