the difference between night and day is
OVERNIGHTS: The Difference Between Night and Day. By. Isabelle Fox, Ph. D. Daytime gives us sunlight Nighttime brings on darkness. Daytime is familiar Nighttime is strange. Day time is for activity Nighttime is for comforting. Daytime is for learning Nighttime is for dreaming.
The simple answer is that the skin drinks during the day and eats at night. The more complex answer addresses the understanding of how various systems in the skin work, particularly the defensive barrier and renewal process. One of the main causes of rapid aging of the skin is exposure to sunlight.