Let me show you an example of why people should sleep till late morning. haha.
Do you know that Descartes, the famous philospher who came up with the famous quote of 'I think, therefore I am' used to stay in bed (due to a supposedly fragile body) till noon :) he'll spend the time in bed contemplating and thinking about whatever problem he had on hand.. and what amazing things he's come up with! haha.
go read up on him. and connect them to biological facts that you know and you'll realize that despite the lack of advanced scientific instruments during his time, he came up with theories and physiological models which actually do describe accurately (though with wrong terms) how the body system works.
while reading up on what wikipedia talks about descartes, i've discovered that wikipedia may not be fully reliable. wikipedia claims that descartes didn't believe that animals had a pineal gland, but in actual fact, he did (Finger,2000 -->a journal). he just argued that the gland had a function in humans that would not be found in animals - the locus for mind-body interaction (Goodwin, 2005 --> my textbook). btw, his theory about the pineal gland is not correct. but other physiological models he proposed are. lol
interesting guy!
anyway, i was talking about how we should stay in bed till late. haha. not to slack, but if you're thinking, some time off in bed is good. lol. might not help if u have a lack of sleep though. haha.
and... surveys find that 10.04pm is the best time for creative juices to flow... which mean that.. maybe sleeping late at night has its advantages too. oh well :) haha.
but must still get fruitful and sufficient sleep :)