Although dogs have existed in human history for many years
But a lot of dog cold knowledge but less people know
Come and follow me to increase the strange
Dogs are the first animal domesticated by humans
In the taxonomy
The status of dogs has always been controversial
Nowadays, people are more inclined to think that domestic dogs
Is not a separate species
Rather, it is a subspecies of wolf
So dogs belong to wolves
But further up the ladder
Wolves belong to the canine family again
So the dog gets back in the game.
As early as 14,700 years ago, in a tomb.
The first undisputed dog skeleton in history was found
This proves that
That wild dogs existed too.
Dogs are domesticated wolves.
If there is a domesticated one, there must be a wild one.
About four or five thousand years ago
Humans came to Australia
And they brought dogs with them
And then the dog got away from the family
They went feral.
That’s how we got the current Australian wild dog
They are considered to be another feral subspecies of wolf
In addition to wolves
There are also Asian wild dogs (also known as jackals)
and the African wild dog, two animals with the word “wild dog” in their names.
But they are already far from being related to dogs.
Dogs don’t have collarbones, so you can’t be cheap.
In order for the dog to get more stride when running and jumping
More conducive to movement
Dogs have slowly lost their clavicles over the course of a long evolutionary process
This structure has an immediate and major disadvantage
Dogs lack flexibility in their forelimbs
We humans have flexible forelimbs.
The clavicle is the biggest contributor
Even cats can scratch people with their claws
But not dogs
They do not have a clavicle
This is why every time a cat or dog fights
Always cats have the upper hand
Two silly dogs stuck just shame over yo
I’m sure you’ve seen dogs on the road after mating
A super awkward picture
The male dog climbed down from the female dog
But their lower body is stuck
Ass to ass connected
Can’t pull it off
This is a condition known as mating plugs
For a few minutes after the sperm is released.
The genitals of the two dogs often remain stuck together.
This behavior seems to increase the chances of fertilization
But fertilization can still occur without this process
The few minutes that they are stuck together
They are very vulnerable to predator attacks
Anyway, this knowledge seems
It seems like a piece of knowledge that doesn’t make sense.
Obedient dogs have droopy ears, curly tails and patterns.
White or yellow starbursts on the forehead
Ears are floppy
The tail is curled
Such external features actually have a lot to do with their personality
has a lot to do with their personality
Scientists have studied mammals before and after domestication
They found that these traits were more frequent in post-domesticated animals
These traits may be one of the more common signs of mammalian
These traits may be a more common marker in mammals
They may even be linked to domesticated genes.
The playful and cute dog is not grown up.
When they were young, wolves had big eyes and short muzzles.
They look much more adorable than grown-up wolves
Dogs that have been selected and bred by humans
Many of them have short muzzles and big eyes
Even many big ones
All have short muzzles
This state is called “juvenile continuation”
It simply means
As an adult, the dog retains the same characteristics it had as a juvenile
The juvenile continuity in dogs is not only in their appearance
It is also in the personality
The largest canine is…
The largest extant wild canid
The largest species is the wolf
Weighing up to 60 kg
But in the history of the earth
There are also some much larger canines.
One of the more famous is naturally the dire wolf
Weighing up to 110 kg.
But it wasn’t the largest canid in history either
About 10 million years ago.
North America, there was an ancient canid called the Canis lupus.
It could reach 170 kg.
Bigger is not a baby…
The smallest canine was…
This little cutie that lives in Africa is up to 40 cm long
Weighs up to 1.6 kg
Its long evolution has given it a pair of super cute big ears
Cute, right? You can’t keep cute, so die trying.
Silly dogs are good at running
Dogs have inherited the wolf ancestors’ skill of running
Wolves are one of the animals that can run for a long time
Wolves can walk at a slow speed of 10 km per hour for several hours.
Compared with cheetahs
The endurance is really amazing
Under the selective breeding of human beings
There are many breeds of dogs that are good at running, such as the lingtons and spaniels.
The maximum speed of a lindy can reach 70 km/h
It’s really a long wave that pushes the previous wave
After reading this
Does it feel like strange knowledge has been added?
Please judge for yourselves whether it is useful or not.
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