The best friend of man, the most faithful and noble pet we can have: the dog.
The dog belongs to the species of canids, as well as wolves, dingoes, coyotes or jackals.
The smallest dog breed that exists is the Chihuahueño, the biggest is the Great Dane, the heaviest is the San Bernardo and the fastest is the Greyhound.
The dogs live an average of 8 to 16 years (according to the size, the smaller the more they live).
Dogs sweat through the bearings of their feet.
Dogs have a night vision far superior to human.
Dogs can hear sounds from a distance of 225 meters.
A newborn dog does not see or hear anything at all.
The first week of the puppy's life is spent 90% of the time asleep. 10% spend it eating.
Dogs began to be domesticated in the Palaeolithic era.
There is no other animal species in the world that has the diversity of races like the dog with more than 800 types.
The dogs are kept fresh by the nose. The longer the muzzle is, the easier it is to cool down.
The dog's biological clock is perfect. They know exactly when to eat, sleep, walk, etc.
The dog that has lived the longest has been 29 years.
The first creature to be sent to space was the dog Laika in 1957.
There are dogs that detect attacks of epilepsy in humans before they appear.
The largest delivery that has occurred has been 23 puppies.
Dogs and humans share 75% of our genetic code.