Cows can sleep standing up, but they can only dream lying down.
745
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Squirrels forget where they hide about half of their nuts.
698
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Condoms were originally made of animal intestines or linen.
347