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Comment on *Yawn*

Isn’t the leading theory that yawning is more about cooling down the brain temp rather than a lack of oxygen or buildup of CO2?

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Angelevo@feddit.nl ⁨9⁩ ⁨hours⁩ ago
Yeah, you are correct. There are several reasons. :)

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DarrinBrunner@lemmy.world ⁨5⁩ ⁨hours⁩ ago
Which does nothing to explain why it’s “contagious”.

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- StarvingMartist@sh.itjust.works ⁨5⁩ ⁨hours⁩ ago
  I thought the idea was that back when we were in settlements, keeping watch out into the dark, the yawn would happen to a sentry if nothing was going on and would subconsciously signal to other humans, even the watch dogs that " nothing is going on, all is well" then spreading throughout the camp as sort of a psychic link, literally conveying information at the speed of light to anyone who can see you.
  
  At least that’s what some article I read had to say about it
  
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- dependencyinjection@discuss.tchncs.de ⁨5⁩ ⁨hours⁩ ago
  I’d say for empathy and humans showing connection by yawning when others do.
  
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