Cows can sleep standing up, but they can only dream lying down.
745
The human brain is more active during sleep than during the day.
28
Honeybees never sleep.
276
Those who get out of bed by 7am are more likely to be thinner and happier.
20
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
The average cat sleeps about 2/3 of the day.
203