Some interesting facts about cats include they have rough tongues that help them clean themselves and enables them to eat certain foods, there are 32 muscles in a cat's ear and there are about 100 different domestic cat breeds. A group of young kittens is called a kindle, while a group of adult cats is referred to as a clowder. In some cultures, a black cat is a good omen.
In many countries, it is bad luck to cross paths with a black cat. In ancient Egyptian times, the killing of a cat was considered a crime for which the penalty was death. Egyptians also embalmed their cats because these were sacred animals.
Some physical traits associated with cats include their ability to see very clearly in the dark. Similarly, cats are not completely color blind and are able to distinguish the colors red and blue. They have a keen sense of smell and use both the nose and the Jacobson's organ found at the roof of the mouth for this purpose. Cats can also walk on their claws instead of the pads. Cats are unable to move to their jaws sideways and their collarbones are not rigid. Felines can make nearly 100 different vocal sounds.
An indoor cat has a life span of about 20 years. Cats can spend up to 18 hours a day sleeping, but they can still react to any stimuli in their immediate surroundings. It is possible for a cat to survive a fall from a seventh floor.