The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
The Savannah is the largest domestic cat breed. It resembles a small leopard and behaves like a dog. They can grow up to 40 lbs, have an eight foot vertical jump, and can be trained to walk on a leash and play fetch.
17
There's a rare breed of pig that looks like a sheep.
14
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
A cow produces around 200,000 glasses of milk in her lifetime.
373
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
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20