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FROM OUR ADVERTISERS ... • Advertise With Us ... E-mail This...
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www.al.com/health-fitness/press-register/
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Yawning...And Why Yawns Are Contagious ... Yawns become contagious to people between the first and second years of life. ... It is possible that yawns are contagious because at one time in evolutionary history, the yawn served to coordinate the social behavior of a group of animals. When one member of the group yawned to...
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faculty.washington.edu/chudler/yawning.html
faculty.washington.edu/chudler/yawning.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. ... But there is one idea about yawning that everyone knows to be true. It seems contagious. If you yawn...
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kidshealth.org/kid/talk/qa/yawn.html
kidshealth.org/kid/talk/qa/yawn.html
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THE BODY BEAUTIFUL; How are yawns contagious? ... I've also heard that yawns are contagious due to a Pavlovian response (like the salivating dogs when a bell rings) caused by the brief feel-good moment which occurs when the oxygen levels in the bloodstream are boosted.
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www.guardian.co.uk/notesandqueries/query/0,5753,-21641,...
www.guardian.co.uk/notesandqueries/query/0,5753,-21641,00.html
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