In everyday life, you are engaged in many types of physical activities, but most people do not know why those physical activities happen. Yawning is also a part of these activities. Yawning often occurs due to lack of sleep, excessive sleep and being tired. In fact, a person can yawn 5 to 18 times in a day and this is also a common thing. Whenever our body needs more oxygen or in other words, when there is a lack of oxygen in the body, our body tries to suck a…
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