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4. Do We Yawn When It's Colder Outside?

Andrew C. Gallup, Ph.D. predicted that when the air is colder outside, we should yawn more because the brain prefers cooler air opposed to warmer. His team traveled to Tucson, Arizona on two different occasions to test this theory. Once they went in the winter when it was 71.6 degrees Fahrenheit and the other in the summer when it was 98.6 degree Fahrenheit. In all of the studies, humans, rats, and parakeets yawned more when it was colder outside or if they were outside longer in cooler weather opposed to a hotter climate.

yawning cold

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