Does anybody ever come home from a long day of work or a hard day at school and only one thing is on your mind. It is probably the greatest feeling on earth, well at least one of the greatest feelings on earth. What am I talking about? I am talking about sleep. Since the beginning of time history is filled with people fascinated with sleep. Does anybody ever think about why we sleep or …showed first 75 words of 1179 total…

…showed last 75 words of 1179 total…minutes of a nights sleep is spent in stages 3 and 4 NREM sleep. As the amount of deep sleep decreases throughout adulthood, more time is spent in lighter sleep, giving the reason people usually beginning in their forties wake up easily during the night. By the time people reach their sixties, total sleep time averages about 6 hours per night. Older people often spend part of the night simply resting with their eyes closed rather that sleeping.