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With your pencil and paper, keep track of the number of times you yawn while you are reading this page. I hope reading this page is not boring, but you may find that just thinking and reading about yawning makes you yawn.
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faculty.washington.edu/chudler/yawning.html
faculty.washington.edu/chudler/yawning.html
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While the exact mechanism is unclear, many doctors believe low oxygen levels in the lungs trigger yawning in an effort to bring more O2 into the body. ... THE TRUTH IS that we don’t completely understand why people, or animals for that matter, yawn. It’s widely assumed that yawning occurs because we are tired or bored...
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www.msnbc.msn.com/id/3076713/
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It is actually still an unknown mystery of life. Though there are good theories supporting why humans and animals yawn, they are not conclusive. It takes about six seconds. Slowly, you take in a deep breath, exhale more quickly, stretch out...
http://wiki.answers.com/Q/Why_do_we_yawn
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What makes us yawn and why does it seem to be contagious? ... Next time you're in a meeting, try this little experiment: Take a big yawn, cover your mouth out of courtesy, and watch and see how many people yawn. There's a good chance that you'll set off a chain reaction of yawns.
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www.howstuffworks.com/question572.htm
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If you yawn in class, you'll probably notice a few other people will start yawning, too. Why is that? ... Everybody yawns — from unborn babies to the oldest great-grandparent. Animals do it, too. But why, exactly, do people and animals yawn? No one knows for sure. But there are many theories (ideas) about why people yawn.
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kidshealth.org/kid/talk/qa/yawn.html
kidshealth.org/kid/talk/qa/yawn.html
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Everybody yawns — from unborn babies to the oldest great-grandparent. Animals do it, too. But why, exactly, do people and animals yawn? No one knows for sure. But there are many theories (ideas) about why people yawn.
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kidshealth.org/PageManager.jsp?dn=KidsHealth&lic=1&ps=3...
kidshealth.org/PageManager.jsp?dn=KidsHealth&lic=1&ps=307&cat_id=124&article_set=10318
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Yawn - Wikipedia, the free encyclopedia
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A yawn (from the Middle English yanen , an alteration of yonen or yenen , which in turn comes from the Old English geonian ), is a reflex of simultaneous inhalation of air and stretching of ...
en.wikipedia.org/wiki/Yawn
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Definition of yawn in the Online Dictionary. Meaning of yawn. Pronunciation of yawn. Translations of yawn. yawn synonyms, yawn antonyms. Information about yawn in the free online English dictionary and encyclopedia. ... (inf: = bore) the film was a yawn → der Film war zum Gähnen (langweilig); what a yawn!
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www.thefreedictionary.com/yawn
www.thefreedictionary.com/yawn
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