Your yawn may reveal how smart you are: Mammals with bigger and more complex brains gape for longer

Next time you try to stifle a yawn, it might be worth discarding polite etiquette by letting your mouth gape for as long as you need because it could help to reveal how smart you are.
Biologists have discovered a surprising relationship between the length of time mammals yawn for and how big and complex their brains are.
They believe it may also be a sign of greater cognitive ability. 
WHY DO WE YAWN? The exact physiological function of yawning is still largely a mystery.
It appears to be triggered in a number of ways - including tiredness, hunger, and boredom.
But it can also be 'caught'... read more

5 October 2016 in Science &Technology, Views: 41
Source: Daily Mail

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