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why do we yawn
https://www.google.com
Mobile-friendly - May 12, 2014 - Well, both sleep
deprivation and exhaustion are known to increase
brain temperature, so while it’s true that we yawn
to combat lack of sleep, yawns don’t make us
‘more awake’ but instead help keep our brains
Why do we yawn? - The Independent
www.independent.co.uk › News › Science
We yawn when we’re sleepy or bored or if
we see someone else yawn. Some people
also yawn when they’re anticipating
something important and when they’re
stressed. Many think it’s because the brain
lacks oxygen, but according to a new study,
the thing most of these instances have in
common is thermoregulation.
Why Do We Yawn? | IFLScience
www.iflscience.com/.../why-do-we-yawn
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