Sleep is a very specific and partly discovered phenomenon. Here are some surprising facts about sleep you probably don’t know.
1.Man is the only mammal that willingly delays sleep.
2.The record for the longest period without sleep is 18 days, 21 hours, 40 minutes during a rocking chair marathon. The record holder reported hallucinations, paranoia, blurred vision, slurred speech and memory and concentration lapses.
3.Humans spend a third of their life sleeping. That’s about 25 years.
4.A new baby typically results in 400-750 hours lost sleep for parents in the first year.
5.An experiment in 1998 found that a bright light shone on the backs of human knees can reset the brain’s sleep-wake clock.
6. Some studies suggest women need up to an hour’s extra sleep a night compared to men, and not getting it may be one reason women are much more susceptible to depression than men.
7.Divorced, widowed and separated people report more insomnia.
8. Newborns sleep a total of 14 to 17 hours a day on an irregular schedule with periods of one to three hours spent awake.
9.Lack of sleep can cause weight gain of 2 pounds (0.9 kg) in under a week.
10.A snail can sleep for 3 years.
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