Cows can sleep standing up, but they can only dream lying down.
745
Cats and dogs can hear ultrasound.
350
There's a lizard known as the 'Jesus Lizard' that can run across water.
11
Cats sleep for 70% of their lives.
8
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
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
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Two dogs were among the Titanic survivors.
262