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Why does human yawn?
May 3, 2008 22:56
  • FRANKENSTEIN
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Do you usually yawn? Scientists say a person begins to yawn when he/she is a 15-week-old embryo. We all think that yawning is sign of fatigue, but scientists say that yawning might be an ominous sign which indicates there are some harmful gases in our lungs. They also claimed that yawning might be socially contagious.

May 3, 2008 22:57
#1  
  • FRANKENSTEIN
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Tired?

May 3, 2008 22:58
#2  
  • FRANKENSTEIN
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Refresh after yawning?

May 3, 2008 22:59
#3  
  • FRANKENSTEIN
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The book must be boring?

May 3, 2008 23:00
#4  
  • FRANKENSTEIN
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Let's yawn together! Yawning is socially contagious.

May 4, 2008 18:26
#5  
Heh I yawned just looking at this threat lol.
May 5, 2008 00:40
#6  
I would say it is contagious, I used to pretend to yawn when I was at work and within seconds 2 or 3 of my work mates would be yawning and cursing me at the same time. he he
Alan
May 19, 2008 07:41
#7  
  • APAULT
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My elder sun yawns within minutes of starting to talk with me. Griz and JCN, you do not need to reply to this comment :)
May 19, 2008 09:20
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  • GARYKINKADE
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Whenever my wife looks at me she yawns...........Geez........hmmm.
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