Wednesday, 18 December 2013

human biology - Why do people look different after a long sleep?

What happens during a long sleep that makes people look odd when they have just woken up? Why doesn't the same phenomenon occur in the case of a person who lies down for an extended period of time, but stays awake? I've noticed that some nights seem to make a bigger difference than others in the appearance of the sleeper, but haven't noticed a pattern.

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