Cats have become one of the world's most popular pets, what characteristics and charm they have, let's learn about them!

1. Eyes

Cats have large, round eyes, with quite excellent night vision and strong pupil accommodation.

In bright places, the cat will shrink the pupil as narrow as a line to reduce the damage to the retina.

In the dark, the cat's pupils can be opened round and large.

2. Ears

The cat's two ears can be turned in different directions individually.

When the cat is angry or frightened, the ears will be pressed back and a growling sound will be emitted.

3. Sense of smell and touch

The cat's sense of smell is sensitive, and the domestic cat's sense of smell is 14 times greater than that of humans.

The cat's mustache is rich in sensory properties and can compensate for the lack of vision in the dark and sense the presence of objects.

The cat's beard is also a ruler, the cat can be based on the circle of the beard to determine whether it can pass through a narrow place.

4. Teeth

The cat's teeth are divided into incisors, canines, and molars.

The canine teeth are particularly well developed, sharp as a cone, and can easily snap the spine of a mouse.

5. Excellent balance

The cat has an excellent balance mechanism, it keeps its body balanced through its tail and can jump from 3 - 4 stories without injury.

6. Love to eat mice

Dr. Mueller, a professor of biology at the University of Heidelberg in Germany, discovered after years of exploration that there is a substance called "oxalic acid" that can improve the night vision of mammals.

Cats can not synthesize oxalic acid in the body, if the long-term lack of this substance, the cat's night vision will be reduced, and the loss of nocturnal activity.

However, mice have this substance in their bodies, so cats can only make up for the lack of oxalic acid in their bodies by constantly hunting mice, to maintain and improve their night vision to survive. 

7. Very sleepy

Cats sleep about twice as long as people, and most cats sleep 16 hours a day. It can be said that cats spend two-thirds of their time in sleep.

8. Likes to make purring sounds

When cats are resting, they often make a purring sound in their throats.

American scientists have found that this is one of how cats heal themselves. The purring sound from the throat helps them to heal bone injuries and organ damage, and also makes them stronger.

Scientists have also found that exposing the human body to the same sound waves as a cat's purring can help improve bone quality in humans.

9. Very clean

Cats have a "cleanliness" and are one of the most hygienic animals.

Every day, they will use their paws and tongues to clean their bodies, wash their faces and groom their coats.

Each time will be in a fixed place to urinate and defecate.