9 Fun Facts About Sleep: Quick Facts

Written and fact-checked by

The Information Architects of Encyclopaedia Britannica

Photos

See All Images →

Topics

sleep Do Sharks Sleep?Do We Really Swallow Spiders in Our Sleep?Why Do Horses Sleep Standing Up?REM sleep NREM sleep Why Is Sleep Important?How Much Sleep Do You Need?Does Eating Turkey Make You Sleepy?Do snakes sleep?How do fish sleep?