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Yawning - The Yawn-O-Meter (How Long Can You Last?)

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Offline Sara

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Yawning - The Yawn-O-Meter (How Long Can You Last?)
« on: March 22, 2014, 01:23:37 PM »
How long can you last before yawning?
(No, this assembly is NOT boring!)
http://en.wikipedia.org/wiki/Yawn




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Tags: yawn science 
 


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