Why we yawn
Why can´t we avoid yawning?
It is irremediable. We might have seen a friend or a family member yawning and then a few seconds later, we repeat the same action. It is a catching reflex and unfortunately, we cannot control it. Researchers have claimed that such a contagious action actually occurs in the next 5 minutes as a maximum. We carry that in our DNA. In fact, babies can yawn as early as 11 months old, actually blind people can also listen to the sound that yawning makes.
Many different options point out that it could be a psychological act of empathy towards the person who yawns in order to synchronize the sleeping time. Some points of view state that it is a reflex to ensure you get enough oxygen. Again, there are many explanations out there that attempt to clarify this unique phenomenon.
Yawning can last round one to six seconds. When someone yawns, the heartbeat can increase up to 30%. One theory says that the body needs more oxygen and eliminate the accumulation of carbon dioxide. So, when there is a lack of oxygen (not caused by asphyxiation or chocking), our body attempts to find it by yawning quite strongly. This theory is the one that gets closer to what the logical thinking says as to why we yawn in front of others in the same room.
Fish, snakes, turtles, crocodiles and birds yawn. It is a kind of conditioning that the actual theory of evolution holds where explains how Homo Sapiens used to yawn to shown their teeth and intimidate other animals, which means that yawning could be a voluntary or intentional act.
Besides the scientific explanations explained above, in a social context, people refer it to as sleeping time or when facing a quite boring situation. Ironically, sometimes people yawn to show how bored they are in front of others.
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