Yawns are weird. You’re tired? Why don’t you open your mouth really big about it? What’s that? You’re not tired, but you saw someone else open their mouth big? Well, guess what.
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[–] 2 points 11 months ago (1 child)

Supplying oxygen to brain before task, reused in ape for social?

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  • [–] 4 points 11 months ago*

    My entirely uneducated guess would be that its some, very basal, ancient, basically gasping compulsion, that... just never quite fully got patched out by the subsequent tens of millions of years of evolution.

    Sort of the behavioral version of vestigal limb, way down at some fundamental nervous system level.

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