Sleep:
Cats are champion sleepers. On average they sleep for 16 hours per day. However, bats and opossums actually beat them in snoozing with an average of 20 hours of sleep each day.

On average cats sleep less than opossums and bats
Munchkin Cats:
The Munchkin has short legs due to a dominant gene mutation which gave them the short stature. The name Munchkin was derived from the little people in the movie The Wizard of Oz.

Munchkin cats are named after the little people from the Wizard of OZ
image via
A Group of Cats:
A group of kittens is called a “kindle” and a group of adult cats is called a “clowder.”

a group of adult cats - clowder; a group of kittens - kindle
Cat Eyes:
There are three types of feline eye shapes: almond, round and slanted.

Cats’ Heart Beats:
A cat’s heart beats approximately twice as fast as our hearts – at a rate of 155 times per minute.
Cat Purrs:
Cats can purr while inhaling and exhaling. This is a technique that we simply cannot imitate.

Cats can purr while inhaling and exhaling
image via
Hairball:
There is actually a scientific name for hairball. It is called “trichobezoar.”
Famous Cat Lovers:
In history, these famous persons are known for being true fans of cats:

Leonardo da Vinci

Earnest Hemingway and His Children

Florence Nightingale

Issac Newtown

Abraham Lincoln
Historic World Leaders that were Scared of Cats:
These people ruled as world leaders and conquerors, but they suffered from ailurophobia – fear of cats.

Julius Caesar

Charles XI

Henry II

Napoleon
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8 Things that Cats Do Just Like Dogs 
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Wow, those are interesting. I knew the sleeping one but the hairball one – had no idea!
Yea, it's a big word. I don't even know if I say it correctly.
Cardinal Richelieu!!!
Is he a cat lover too?
One note about cats sleeping less than opossums and bats – that's because humans keep waking us up and petting us. They don't do that to opossums and bats.
black cat in world of animal only one who can see its shadow in dark