Dogs have been man's pet for over 14,000 years.
224
A cow produces around 200,000 glasses of milk in her lifetime.
373
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
Penguins have a gland above their eye that turns saltwater into freshwater.
12
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