664C0F7EFEFFE6 t1_j1bv3yo wrote
Reply to comment by explainlikeimfive-ModTeam in ELI5: If yawning is so the brain can get more oxygen, why do we seem mostly yawn when tired or bored? by StormCloudzz
Bruh, there is no definitive proven answer to why. They’re all theories with limited data.
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