Have you ever wondered why you yawn when someone else yawns in front of you? Have you ever agonized about what causes this reaction or how many times an average person yawn a day? Here are the 10 facts about yawning.
Why do we yawn?
There are so many incredible studies in the world, but yawning is a phenomenon which will always be a mystery for scientists, and they therefore have no concrete explanation. In some science books it is stated that a low oxygen level in our body makes us yawn, bringing in more oxygen from the surrounding and moving out carbon dioxide from the blood. Some theories suggests that yawns are preceded by increases in brain temperature. However, none of the theories were crowned as concrete.