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* Posts by DavidJanes

1 post • joined 22 Jan 2007

Why do we open our mouths to yawn properly?

DavidJanes

Why do we open our mouths to yawn properly?

"The involuntary act of yawning usually includes opening the mouth very wide while slowly taking in a deep breath"

Back to the original question, why?

The article seems to be missing a step. What causes us to open our mouths in the first place?

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