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Why can’t the body heat the epidermis exactly to room temperature?

Please see the embolded phrase below. Why does the body overheat epidermis exposed to the air? Why can’t it heat it sufficiently close to room temperature? The question is: ELI5: Why is it more comforting to have even the thinnest blanket covering when sleeping? It blocks convection cooling (aka. wind draft cooling). If your bedroom […]