Is it true that people only yawn when they are tired? Detailed answer

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Is it true that people only yawn when they are tired? Detailed answer

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Is it true that people only yawn when they are tired?

No. Yawning provides particularly deep ventilation of the lungs. After it, air oxygen is absorbed much more intensively. Therefore, yawning is a kind of fitness for the brain. We yawn when we are tense or when we need to concentrate, focus on something.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

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Mobile phone embedded in teeth 19.08.2002

British engineers D. Auger and D. Loizo proposed the idea of creating mobile phones built into the teeth of their owners.

The miniature size of microcircuits that process radio signals makes it possible to implement this idea in the near future. The "dental telephone" will be implanted directly into the teeth during a routine visit to the dentist. The messages received by such a phone, after being converted into acoustic signals through the bones of the head, will enter the inner ear.

Information transmitted in this way is heard only by one person - the one to whom it is addressed. Therefore, it will be possible to use the "dental telephone" at any time and in any place, even in cinemas and museums.

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