2006-07-23 10:50:22 · 15 answers · asked by yogi bear 1 in Science & Mathematics ➔ Biology
Lack of oxygen to the brain. Its usually at night, or early in the morning. I think seeing someone yawn is likr a subliminal message for you to yawn for your brains health.
2006-07-23 10:54:16 · answer #1 · answered by ♥ Krista ♥ 4 · 0⤊ 0⤋
You yawn to balance the barametric pressure that surrounds us all, others yawn when you yawn b/c you have set the pressure to your level, which doesn't always match with the people you're around. In a way it's a dominance struggle over who gets to control the pressure.
2006-07-23 10:58:24 · answer #2 · answered by Solstice 3 · 0⤊ 0⤋
No one knows why we do. It just happens. It is like an automatic response. You yawn, I yawn.
2006-07-23 10:56:35 · answer #3 · answered by vhat40 4 · 0⤊ 0⤋
its to do with the wars. when you yawn you get an extra burst of oxygen. so when someone yawns your brain automatically rhinks that there is a lack of it therfore you yawn. its a survival instinct.
2006-07-24 06:19:13 · answer #4 · answered by Laura F 2 · 0⤊ 0⤋
Nobody really knows. Fact is, we don't know why people yawn, period. Even babies in the womb yawn, so it's not something that you learn.
2006-07-23 10:57:59 · answer #5 · answered by NannyMcPhee 5 · 0⤊ 0⤋
its a socialogical thing. a way for the tribe to all change gears. you yawn when yer winding down or waking up. this is a signal to the others around you that they should follow suit or get clubed in the head.
it keeps everybody on the same track.
2006-07-23 10:55:08 · answer #6 · answered by punk_with_answers 3 · 0⤊ 0⤋
just like what Krista posted earlier... lack of oxigen. we yawn because our brain tells us we are getting less O2 and we need to take in more O2. that's why we yawn - - to force us take in more O2. while we take in extra O2, people next to us become lack of O2 - - we snatch their O2 supply. and they yawn too!! tat's wny yawning appear to be contagious.
2006-07-23 20:44:39 · answer #7 · answered by snow_cat 1 · 0⤊ 0⤋
ye weird that, its quite a good way to see if someone can read english if they wont tell you, show them the word and they will yawn.
2006-07-23 13:49:45 · answer #8 · answered by thejur 3 · 0⤊ 0⤋
not sure as it should be a physiological response within the individual but I yawned when I read your question!!
2006-07-23 10:53:32 · answer #9 · answered by Anonymous · 0⤊ 0⤋
its not true.... otherwise, imagine a football match... if one person yawns, then surely EVERYONE ,fans,footballers,camara crew, etc etc would all yawn....
it would be a bit like a mexican YAWN.....(wave)
yes ive been in places where my freinds have yawned, and i havnt
2006-07-23 11:43:59 · answer #10 · answered by robynbiker 5 · 0⤊ 0⤋