We’re not exactly sure what yawns are or why we yawn. We know they’re contagious, but we’re still working out all the other details. In today's Academic Minute, the State University of New York at Oneonta's Andrew Gallup posits that yawns are a mechanism designed to cool the brain. Gallup is an assistant professor of psychology at SUNY Oneonta. A transcript of this podcast can be found here.

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