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Today I Learned@lemmy.worldEnglish · 1 年前

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 · 1 年前

Yawn - Wikipedia

en.wikipedia.org

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El Barto@lzrprt.sbs
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1 年前
It’s from when caveman wanted to leave their friends cave and go home, but can’t get an ugg in and they don’t want to be rude.

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