The world's smartest pig, owned by a mathematics teacher in Madison, WI, memorized the multiplication tables up to 12.
Rattlesnake mating sessions
Rattlesnake mating sessions have been known to last more than 22 hours.
More Animals Facts
World's Smartest Pig
The world's oldest crow is 118 years (estimated age).
Dogs have been man's pet for over 14,000 years.