Sleep: One of the most mysterious things about humans. We know we need it and can't function without it, but between dreams and our circadian rhythm, there's so much unknown.
Most of what we do know about sleep has only been discovered within the past 50 years. As researchers continue to dig deeper to learn more about our enigmatic slumber, they'll no doubt add to what are already some truly fascinating discoveries.
- Humans are the only mammal that willingly delays sleep.
- Two-thirds of a cat's life is spent sleeping.
- The record for the longest period without sleep was set back in 1964, when a man named Randy Gardner stayed awake for 11 days!
- About 15% of the population are sleepwalkers.
- Sleep deprivation will kill you quicker than food deprivation.
- A snail can sleep for three years.
- People who are born blind experience dreams involving emotion, sound and smell, rather than sight.
- You forget 50% of your dreams within five minutes of waking up.
- New parents miss out on six months of sleep within the first two years of their children's lives.
- Sea otters hold hands when they sleep so they don't drift away from each other.
- Research shows people sleep better during a new moon and worse during a full moon.
- We have no evidence as to whether animals dream or not.
- You will begin experiencing the symptoms of sleep deprivation following 17 straight hours being awake. This includes behavior similar to those with a blood alcohol level of .05%.