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16 Surprising Facts About How You Sleep

You spend a third of your life sleeping. You might as well learn a little more about it.

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1. "The record for the longest period without sleep is 18 days, 21 hours, 40 minutes."

2. "Having a newborn baby typically results in 400–750 hours of lost sleep for the baby's parents in the first year."

3. "A survey of 6,000 British adults found that they are more likely to fall asleep when they heard Coldplay."

4. "After five nights of partial sleep deprivation, three drinks will have the same effect on your body as six would have if you had slept enough."

5. "An average human will spend one-third of their life sleeping."

6. "12% of people dream in black and white."

7. "Before color television the number was 75%."

8. "You can only dream about faces you have already seen."

9. "The human circadian clock is actually slightly longer than 24 hours. Hence, the internal circadian rhythm is synchronized to 24 hour day cycle by environmental cues."

10. "There are two periods of maximum sleepiness — the late afternoon (from around 3 to 5 PM) and the end of the night (from around 3 to 5 a.m.). There are also two periods of maximum alertness — around 1 a.m. in the morning and 1 p.m. in the afternoon."

11. "On average, a newborn sleeps for 10 to 19 hours per day. Bottle-fed infants sleep for longer periods than breast-fed infants."

12. You're more likely to die from sleep deprivation before starvation. It takes two weeks to starve, but 10 days without sleep can kill you.

13. Blind people can still see images in dreams.

14. "Getting too little sleep often makes people feel hungrier than normal, leading to overeating and weight gain."

15. "Losing sleep reduces your pain tolerance. It may disrupt the body’s pain signaling system, heightening sensitivity to painful stimuli."

16. "Scientists have determined that counting sheep is ineffective for putting oneself to sleep."

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