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Merely thinking about or seeing someone yawning can make you yawn. But why?
Reasons we we yawn. It was once believed that the main function of yawning was to increase otherwise low oxygen levels, but a 1987 study disproved that theory. And despite extensive additional ...
Snakes yawn, both to realign their jaws after a meal and for respiratory reasons, as their trachea can be seen to expand when they do this. Dogs, and occasionally cats, often yawn after seeing people yawn [11] [65] and when they feel uncertain. [66] Dogs demonstrate contagious yawning when exposed to human yawning.
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A non-respiratory gas movement is another process that moves air in and out of the lungs that do not include breathing. Yawning is a reflex that tends to disrupt the normal breathing rhythm and is believed to be contagious as well. [14] The reason why we yawn is unknown.
Which animals yawn, and has it evolved independently more than once? A little further explanation as to how yawning is advantageous - how would an organism that didn't yawn/respond to yawns be more likely to die? Physiologically, what is the difference (if there is any) between a true reflexive yawn and a voluntary effort to simulate a yawn?
Wondering why you always yawn when other people do? Catch your dog yawning at the same time? Find out why the tired reflex is so contagious.
In the future, please give us a chance to answer your question before assuming that we won't do so properly. Physics is separate from logic. We can easily conceive of different physical constants and even altogether different physical laws, but I certainly can't conceive of what it would mean to change logic.