The average cat sleeps about 2/3 of the day.
203
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
You forget 90% of your dreams.
256
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33