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Today I Learned@lemmy.worldEnglish · 2 years ago

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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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 · 2 years ago

Yawn - Wikipedia

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2 years ago
i thought it was to clear out carbon dioxide build up deep in your lungs, and instinctually its an indicator of rest?

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