Mind Hacks: The Social Yawn
Interesting article about yawning, particularly on how it starts in humans as early as 10 weeks but it takes until you are three before you start 'catching' yawns.
"http://www.mindhacks.com/mt/mt-tb.cgi/21"
"http://www.mindhacks.com/mt/mt-tb.cgi/21"
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