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Yawning

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choca | 11:04 Wed 21st Feb 2001 | Body & Soul
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Why do we yawn when someone else does (on tv or in the immediate vicinity)?
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Avatar Image lolly81
When you yawn you are expelling excess carbon dioxide which someone close can breathe in. This intake of carbon dioxide causes that person to yawn. They say even reading about it can make you yawn....
11:39 Wed 21st Feb 2001

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