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Sanaa Village Publications cd roms / books • articles • references • quotes
Scientists believe the average adult needs 7 to 9 hours of sleep, while
babies, children and teenagers need up to 10-18 hours. Sleep occurs in
three stages during the night from light, deep to rapid eye movement (REM)
sleep. An average complete sleep cycle takes 90 to 110 minutes. Peaceful
sleep brings you these affects and many more.
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