You forget 90% of your dreams.
256
"Dysania" is the state of finding it hard getting up out of bed in the morning.
33
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
Bats sleep 18-20 hours per day.
5
The average cat sleeps about 2/3 of the day.
203