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The Demon on Your Chest and Other Terrifying Tales of Sleep ParalysisAn unusual condition called sleep paralysis has been frightening people for centuries, and different cultures have different ways to explain the frightening phenomenon.
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'Super Sleepers' May Actually Be Sleep DeprivedPeople who think they can get by on very little sleep may be more tired than they realize, a new study finds.
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Should You Wake Up a Sleepwalker?Sleepwalkers aren’t soulless, they’re just unconscious. If you do happen upon someone experiencing somnambulism, what should you do?
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Caffeine's 'Boost' Disappears When You're Extremely Sleep-DeprivedPeople who don't get enough sleep for several days in a row can't rely on caffeine to give them a mental boost, new research finds.
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How Much Sleep Does Your School-Age Child Need?When it's time for kids to go back to school, what time should they go back to bed?
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Why do animals hibernate?For some animals, hunkering down in a cozy den when nights are long and temperatures are low is not just a matter of temporary comfort — it's necessary for survival.
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How Many Adults in Each State Engage in All 5 Key Health Habits?There are five key habits that researchers have definitively linked with better health and a longer life. But few people are doing them.
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Do Trees Sleep at Night? -
How Much Sleep You Need As You Age (Infographic)Chart shows sleep requirements for different age groups.
