Bats sleep 18-20 hours per day.
5
Cows can sleep standing up, but they can only dream lying down.
745
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
The human brain is more active during sleep than during the day.
28
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
6