An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
There's a rare breed of pig that looks like a sheep.
14
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
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