Do you yawn when others yawn ---contagious yawning"

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When you see the other person yawning in the room, your instinctive response is to yawn too. However, it doesn't mean you are fighting with the urge to sleep. yawning is a process that protects our brain from overheating and serves as an alert signal to others. why do we yawn ? hte theory that yawning results from the lack of oxygen has been disapproved. experiments showed that the alterations in oxygen and carbon dioxide levels in the blood didn't affect the yawning reaction. In fact, yawning was found to serve as a brain-cooling mechanism.