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The science behind the yawn
 

The science behind the yawn

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It happens when you wake up – or perhaps after a good, hearty meal – or when you see (hear) someone else is doing it. While yawns are often enough accompanied by the urge to stretch a little – have you ever wondered about the why’s behind this oh-so familiar gesture each time you do it? Although yawning is often thought of as a sign of boredom or tiredness—could there be more to it?
 
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10 Jun 2017 - General