Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Cows can sleep standing up, but they can only dream lying down.
745
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
Bats sleep 18-20 hours per day.
5
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402