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Why Do We Yawn? What Is It's Purpose?

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posted on Jun, 30 2010 @ 01:21 PM
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I recently was just thinking of this, I was gonna make a thread but i realised there already is one. I heard it was a change in pressure in your brain? True? False?




posted on Jun, 30 2010 @ 01:29 PM
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Our subconscious mind makes us Yawn

Thus giving us something to ponder over "Why do people yawn"


Its our subconscious way of saying, There are things that you just dont understand george



posted on Jul, 7 2010 @ 03:06 PM
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Animals
Actually in some animals, like baboons yawning is seen as a dominating gesture, or a way of communicating your rank to the group.
Lions use it to show they are "ok" or "relaxed" with another lion.

Humans
Some scientists think it might be to get larger groups of humans, to rest simultaneously.
Long ago humans used to live in rather large groups.
And yawning might have been a signal to the group, to "relax" or "rest".

The theory of releasing toxins, seems strange to me.
Since all u do it tense up muscles and release your breath from your lounges.



posted on Jul, 7 2010 @ 03:11 PM
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Not sure, but I yawned as soon as I read the word 'yawn' in the thread title
*

Actually I thought it had something to do with a lack of air - I have mild asthma, and often when I can't get a full breath in I do start to yawn. I remember reading somewhere that yawning is a sign of `air hunger` or something.


[color=C6AEC7]*I also yawn when other people yawn. Or when my dog yawns.



Edit to add: Just told hubby about this thread. He's yawning too now


[edit on 7-7-2010 by tappy]



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