A cat sees about six times better than a human at night because of the tapetum lucidum , a layer of extra reflecting cells which absorb light.

A cat uses its whiskers to determine if a space is too small to squeeze through. The whiskers act as feelers or antennae, helping the animal to judge the precise width of any passage.

A cat will clean itself with paw and tongue after a dangerous experience or when it has fought with another cat. This is believed to be an attempt by the animal to soothe its nerves by doing something natural and instinctive.

A cat's arching back is part of a complex body language system, usually associated with feeling threatened. The arch is able to get so high because the cat's spine contains nearly 60 vertebrae which fit loosely together. Humans have only 34 vertebrae.

A cat's jaws cannot move sideways.

A cat's tongue consists of small "hooks," which come in handy when tearing up food.

A polecat is not a cat. It is a nocturnal European weasel.

Adult cats with no health problems are in deep sleep 15 percent of their lives. They are in light sleep 50 percent of the time.

An adult lion's roar can be heard up to five miles away, and warns off intruders or reunites scattered members of the pride.

Ancient Egyptians believed that "Bast" was the mother of all cats on Earth. They also believed that cats were sacred animals.

Cat scratch disease, a benign but sometimes painful disease of short duration, is caused by a bacillus. Despite its name, the disease can be transmitted by many kinds of scratches besides those of cats.

Catnip can affect lions and tigers as well as house cats. It excites them because it contains a chemical that resembles an excretion of the dominant female's urine.

Cats are the only domestic animals that walk directly on their claws, not on their paws. This method of walking is called "digitigrade." When cats scratch furniture, it isn't an act of malice. They are actually tearing off the ragged edges of the sheaths of their talons to expose the new sharp ones beneath.Cats have a third eyelid called a haw and you will probably only see it when kitty isn't feeling well.

Cats have amazing hearing ability. A cat's ear has 30 muscles that control the outer ear (by comparison, human ears only have six muscles). These muscles rotate 180 degrees, so the cat can hear in all directions without moving its head.A cat has four rows of whiskers.

Cats have better memories than dogs. Tests conducted by the University of Michigan concluded that while a dogs memory lasts no more than 5 minutes, a cat's can last as long as 16 hours - exceeding even that of monkeys and orangutans.

Cats have more than one hundred vocal sounds, while dogs only have about ten.

Cats purr at about 26 cycles per second, the same frequency as an idling diesel engine.

Cats step with both left legs, then both right legs when they walk or run. The only other animals to do this are the giraffe and the camel.

Cat's urine glows under a black light.

Cats, not dogs, are the most common pets in America. There are approximately 66 million cats to 58 million dogs, with Parakeets a distant third at 14 million.

Cheetahs make a chirping sound that is much like a bird's chirp or a dog's yelp. The sound is so an intense, it can be heard a mile away.

Despite its reputation for being finicky, the average cat consumes about 127,750 calories a year, nearly 28 times its own weight in food and the same amount again in liquids. In case you were wondering, cats cannot survive on a vegetarian diet.

Each day in the US, animal shelters are forced to destroy 30,000 dogs and cats.

Felix the Cat is the first cartoon character to ever have been made into a balloon for a parade.

In 1888, an estimated 300,000 mummified cats were found at Beni Hassan, Egypt. They were sold at $18.43 per ton, and shipped to England to be ground up and used for fertilizer.

In ancient Egypt, entire families would shave their eyebrows as a sign of mourning when the family cat died.

In cats, the calico and tortoiseshell coats are sex-linked traits. All cats displaying these coats are female... or occasionally sterile males.

Lions are the only truly social cat species, and usually every female in a pride, ranging from 5 to 30 individuals, is closely related.

Neutering a cat extends its life span by two or three years.

Purring is part of every cat's repertoire of social communication, apparently created by the movement of air in spasms through contractions of the diaphragm. Interestingly, purring is sometimes heard in cats who are severely ill or anxious, perhaps as a self-comforting vocalization. But, more typically, it is a sign of contentment, first heard in kittens as they suckle milk from their mother.

The biggest member of the cat family is the male lion, which weighs 528 pounds (240 kilograms).

The cat lover is an ailurophile, while a cat hater is an ailurophobe.

The cat was domesticated over 4,000 years ago. Today's house cats are descended from wildcats in Africa and Europe.

The catgut formerly used as strings in tennis rackets and musical instruments does not come from cats. Catgut actually comes from sheep, hogs, and horses.

The cheetah is the only cat in the world that can't retract its claws.

The Chinese, during the reign of Kublai Khan, used lions on hunting expeditions. They trained the big cats to pursue and drag down massive animals - from wild bulls to bears - and to stay with the kill until the hunter arrived.

The color of the points in Siamese cats is heat related. Cool areas are darker. In fact, Siamese kittens are born white because of the heat inside the mother's uterus before birth. This heat keeps the kittens hair from darkening on the points.

The declawing of a pet cat involves surgery called an onychectomy, in which the entire claw and end bone of each toe of the animal are amputated.

The domestic cat is the only species able to hold its tail vertically while walking. Wild cats hold their tail horizontally, or tucked between their legs while walking.

The normal temperature of a cat is 101.5 degrees.

The only domestic animal not mentioned in the Bible is the cat.

The penalty for killing a cat, 4,000 years ago in Egypt, was death.

The phrase "raining cats and dogs" originated in 17th Century England. During heavy downpours of rain, many of these poor animals unfortunately drowned and their bodies would be seen floating in the rain torrents that raced through the streets. The situation gave the appearance that it had literally rained "cats and dogs" and led to the current expression.

There is no single cat called the panther. The name is commonly applied to the leopard, but it is also used to refer to the puma and the jaguar. A black panther is really a black leopard.

Tigers have striped skin, not just striped fur.

When a domestic cat goes after mice, about one pounce in three results in a catch.

When the Black Death swept across England one theory was that cats caused the plague. Thousands were slaughtered. Ironically, those that kept their cats were less affected, because they kept their houses clear of the real culprits, rats.