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- Humans are the only animals that can delay sleep.
- Cats sleep for 70% of their lives.
- Space travel can cause insomnia.
- Some deaf people sign in their sleep.
- High altitudes can cause sleep disruptions.
- Caffeine does not give you energy. It only blocks the urge to sleep.
- Newborns are like cats. They need 10-18 hours of sleep everyday.
- You can only survive for 11 days without sleep.
- Night shift workers suffer higher rates of illness.
- The hours of sleep healthy adults need ranges from 4 to 10 hours.
- Put babies to bed before they fall asleep. Drowsy babies can learn to self-soothe to sleep.
- We still don't know if animals can dream.
- Melatonin shortens the time needed to sleep, but not the total sleep time.
- 36% of Americans are at risk of falling asleep at the wheel.
- 34% of Americans are allowed to take a nap at work.
- Lack of sleep causes hunger due to higher leptin levels.
- Rates of insomnia increase as you get older.
- Your brain detects light levels to regulate your sleep cycle.
- Blind people can have sleep problems because they can't see light in order to set their circadian rhythm.
- We sleep less during a full moon.
- People who sleep 6.5-7.5 hours live the longest.
- Some animals have to un-hibernate before they can sleep.
- Sleep apnea is correlated with erectile dysfunction.
- Your genes determine if you are a night owl or an early bird.
- 50% of teens are sleep deprived.
- The world record for staying awake without sleep is 11 days.
- Humans are the only species that can't stay away with half of their brain.
- Sleep deprivation makes you more optimistic.
- Lack of sleep makes you act like a drunk.
- Sleep deprivation is classified as a carcinogen.
- Difficulty getting out of bed in the morning is called dysania.
- People sleep longer during a new moon.
- Tibetan monks can sleep upright.
- 50% of UK pilots have fallen asleep while flying a plane.
- Separated people report higher rates of insomnia.
- Lack of sleep can make you gain 2 pounds within a week.
- Knocker-ups were man-powered window-tapping alarm clocks.
- You can't sneeze and sleep at the same time.
- Natural dips in energy at 2am & 2pm make ups want to nap & sleep.
- Sea otters hold hands while they sleep so they don't drift apart.
- Believing you've slept well even when you haven't improves performance.
- Strenuous exercise too close to bedtime makes it hard to fall asleep.
- Regular exercise makes it easier to fall asleep.
- Memories are formed while we sleep.
- Light on your knees can reset your sleep-clock.
- New parents will acquire 6 months of sleep debt before their child turns 2.
Sources:
http://sleepfoundation.org/sleep-news/25-random-facts-about-sleep
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3065172/
http://jp.physoc.org/content/589/1/235.short
http://www.sciencedirect.com/science/article/pii/009042959080262L
http://www.sciencedirect.com/science/article/pii/030439409190276Y
http://www.cell.com/retrieve/pii/S0092867413009616
http://content.time.com/time/health/article/0,8599,1812420,00.html
https://www.scientificamerican.com/article.cfm?id=it-must-be-the-moon-tired
http://www.ncbi.nlm.nih.gov/pubmed/1619000
http://www.bbc.co.uk/news/uk-scotland-23811690
http://en.wikipedia.org/wiki/Unihemispheric_slow-wave_sleep#Species_exhibiting_USWS
http://www.jneurosci.org/content/31/10/3712
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1739867/
http://www.iarc.fr/en/media-centre/pr/2007/pr180.html
http://www.bbc.co.uk/news/science-environment-20937729
http://www.pnas.org/content/108/32/13305
http://www.bbc.co.uk/science/humanbody/sleep/articles/whatissleep.shtml
http://www.nytimes.com/1998/01/16/us/study-offers-surprise-on-working-of-body-s-clock.html
http://aslsafari.blogspot.com/2006/05/do-deaf-sign-in-their-sleep.html
http://es.wikipedia.org/wiki/Knocker-up
http://en.wikipedia.org/wiki/Sneeze
http://en.wikipedia.org/wiki/Sleep_deprivation
http://en.wikipedia.org/wiki/Sea_otter
http://en.wiktionary.org/wiki/dysania
http://www.news.com.au/travel/travel-updates/pilots-doze-off-more-than-you8217d-expect/story-
e6frfq80-1226728383451