22 Facts About Sleep That Will Surprise You. We spend about one-third of our time on Planet Earth asleep. That’s about 16 hours a night as infants, 9 hours as teens and 7 to 8 hours as adults. Until 25 years ago, scientists knew little about this nighttime habit of ours.
22 Facts About Sleep That Will Surprise You
Below, experts in our Sleep Disorders Center share curious and fantastic facts about sleep.