Cows can sleep standing up, but they can only dream lying down.
745
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
You burn more calories sleeping than you do watching television.
348
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
6
If you hold farts in during the day, they'll just come out when you sleep.
16
Bats sleep 18-20 hours per day.
5