Interesting facts about yawning may not be known

Yawning is a familiar thing that any of us do, especially when tired, even a fetus in the womb knows how to yawn. Yawning is very contagious, just look at other people yawning, you can yawn right away. Yet there are many interesting things about yawning that not everyone knows.

Let us discover 15 interesting facts about NGP phenomenon that you may not know in the article below!

Yawning is very contagious.

1. The medical terminology of yawn is oscitation.
2. Most vertebrates in the world yawn, including humans, dogs, chimpanzees and other animals.
3. Yawning is contagious, you can yawn as soon as you hear the word "yawn" as well as when you see or hear others yawning, you can yawn.
4. What makes us yawn? This is one of the everyday mysteries that scientists have failed to find a convincing solution.
5. When one person in the group yawned, more than half of the group would yawn within 5 minutes and the rest would be at least tempted to yawn.
6. The 11-week-old fetus in the womb is already yawning.
7. Men's yawning time is often longer than that of women.
8. The average time of yawning is about 6 seconds.
9. Heart rate always increased significantly during a yawn.
10. Yawning occurs when there is too much carbon dioxide (CO ₂ ) in the blood.
11. The higher the concentration of serotonin, glutamic acid and dopamine in the brain, the more we yawn. The higher the concentration of endorphins, the less we yawn.
12. Yawning has no side effects.
13. Dogs can also yawn when they see people yawning and in cases of emotional instability.
14. 55% of us will stop yawning for 5 minutes after seeing others yawn
15. Blind people will yawn more when they hear yawn or hear directly in a tape.