why do we yawn

Baby animals yawning is
We all do it, and we all know it has at least something to do with how tired we feel. But unlike sleep apnea or laptops in
Brain thermoregulation has been an important component in the study of human evolution. Platek points to the work of anthropologist
Everyone knows yawning is contagious, but can you catch one through a screen? This week, AsapSCIENCE has tried to tackle
Turns out, it's not really that strange of a reaction, Robert Provine, a psychology and neuroscience professor at the Unversity