Some people nap with their eyes open
The longest a person has stayed awake is 18 days, 21 hours, 40 minutes
A new baby in the house causes parents to lose 400-750 hours of sleep in one year
Elephants lie down for REM sleep, but spend the other four cycles standing up
Some animals have sleep cycles like humans, but we don’t know if they dream
The most wild and outrageous dreams occur during REM sleep
Three man-made catastrophes are linked to human error in people who were sleep deprived: Exxon Valdez, Challenger, and Chernobyl
100 years ago, people slept a few hours longer, on average, than we do today
The Internet is one of the biggest distractions to sleep, according to experts
We didn’t record REM sleep until the 50s because scientists were worried about wasting paper
Sleeping pills can disrupt the grieving process
Babies need 10 hours of sleep a day, teens 9, most adults 6.5 to 7.5, women may need one hour more than men to ward off depression, and people over 65 need only 6 hours
