3 years ago

Science Mysteries: Why Do People Yawn?

1 answer:

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The answer is one mystery that still remains unsolved is why we yawn.
and another theory is that when you yawn it sends oxygen to the brain causing your body to be able to stay awake, hence when you are tired and need to stay awake you yawn a lot.

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I find Helen Keller's story impressive because she demonstrates what people are capable of accomplishing. The way Helen Keller grasped words and yearned for more communication is an inspiration.

Explanation:

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