Why is yawning so contagious?

Yawning is so contagious that watching another person, dog or cat doing it, or even just reading about it, can trigger us to yawn.

Are you doing it yet?

It is one of the most common habits of humans, yet we still do not fully understand why we yawn. Previously, Dr Andrew Gallup, evolutionary psychologist at Princeton University said that “yawning is triggered by numerous eliciting stimuli, and thus we are still uncovering why we yawn in certain contexts and conditions.”

Now, a new study from the University of Nottingham has shed light on why this occurs and why yawning is so contagious, and it is to do with the primitive part of the human brain.

Read more on Alphr

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