The dog is a loyal friend of humans. A descendant of a wolf, it is the animal that is most domesticated by humans. Of course, loyalty is also a big reason. Today we are giving you interesting facts about this faithful animal, which may not be known to you.

There are some amazing facts about dogs: 

1. There are around 400 million dogs and hundreds of their breeds in the world.

2. The average life span of a dog is about 10 to 14 years. But his mind is just like a child of a 2-year-old man.

3. Generally the life of small breed dogs is longer than that of big breed dogs.

4. In the dark, dogs use their mustache to take subtle changes in air currents. This gives them a better understanding of the environment and helps them to see in the dark.

5. Dog puppies have 24 teeth and adult dogs have 42 teeth.

6. Dogs have three eyelids, one of which is to keep their eyes moist and protected.

7. The life span of pet dogs is also longer than other dogs.

8. Like human fingerprints, two dogs have unique nose prints.

9. The dog's ability to see in the dark and in the morning is very good.

10. Where there is 4 types of blood of humans - O, A, B, AB. At the same time, dogs have 13 blood types.

11. After the body temperature increases or while panting, the dog's sniffing ability decreases by 40%.

12. The dogs do not sweat on any part except the toes of the feet. Its sole sweat gland is between the toes.

13. Dogs have twice as much muscle in both ears than humans. Where humans have 4 muscles in their ears, dogs have 14 or more muscles in their ears.

14. It is estimated that about 21% of dogs snore in their sleep.