There's some graph I saw somewhere (not even sure whether it was on the web or not) which showed trends in when people woke up. Basically, for the part of your life when you have a nice diurnal sleep cycle, you start off as more a morning person, reach the peak of evening person sometime as a teenager or a twentysomething, and then get more of a morning person again as you get older.
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Date: 2007-08-08 12:22 pm (UTC)