… Yawns are contagious? A study by the University of Pisa in Italy, published in the scientific journal Animal Behavior in April, showed that the chances of a lion yawning after seeing another do the same were 139 times higher than if it had not seen the yawn.

… Among animals, it can be a way of socializing? The study published in Animal Behavior also noted that, after yawning together, lions begin to imitate each other’s behavior, by getting up and walking at the same time.

… This reaction also serves to cool the brain? A lot is still not known about yawning. The most accepted theory in science is that it serves to cool the brain, by bringing it oxygen and blood, thus helping it remain alert.

… Those who yawn the longest have the biggest brains? Researchers at the State University of New York in Oneonta, in the United States, realized that yawning length is not related to the jaw, but to the brain – the bigger the brain, the longer the mouth stays open. The explanation is that bigger brains need more cooling.

Questions

1) What is the relationship between the brain and yawning?
a) The larger the brain, the longer the yawn.
b) The smaller the brain, the longer the yawn.
c) The larger the brain, the shorter the yawn.
d) This relationship only happens in lions.

2) When do you usually yawn?

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