There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
Whales and dolphins can't taste anything other than salt.
11
The cat brain weighs about 30g.
167
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
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
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