However, with the advancement of science and technology, the role of many animals has begun to degrade, such as horses and cows. On the contrary, pets are becoming more and more popular and become people's friends.

Horses played a very important role in ancient wars. Having cavalry almost gave you absolute victory. However, with the advancement of science and technology, the role of many animals has begun to degrade, such as horses and cows. On the contrary, pets are becoming more and more popular and become people's friends. At this time, some friends said, if animals like horses had never appeared in the world, how would human history be rewritten?

Sorry, forgive me for being unkind, because the first thing I thought of was: Success? Donkey tiger? Wrapped in donkey skin? Squat dog walk! Hahaha, the more I think about it, the more I want to laugh and lose my wit. Next, I will interpret this issue from the perspective of biology .

1 has little impact on human history.

does not have much impact. Once we have a large number of Replacement, secondly, we humans did not play a big role in the emergence and evolution of horses. (Domestication only began 5,000 years ago. At that time, Egypt was already building the pyramids, and the Chinese had domesticated millet for nearly 2,000 years, far later than the domestication of dogs 30,000 years ago. Scientist Confirmed that the domestication of horses began 5,000 years ago / When the Egyptians were building the pyramids, what were the Chinese doing? What are the various civilizations in the world doing? )

2, horses

horses are classified biologically as follows: Kingdom Animalia, Phylum Chordata , Subphylum Vertebrates, Class Mammalia, Order Perissodactyla, Equidae , Equus . Therefore, we have a large number of substitutes. I made the following picture. You can take a look at

. For example, in the genus Equus, there are ordinary horses and wild horses. If we go a little further up to Equidae, we can have:

, donkeys, domestic donkeys, wild ass: African wild ass , Asian wild ass .

, zebra : ordinary zebra , pseudo-zebra

Therefore, if there is no Zhang butcher, there is no need to worry about bringing hairy pig , we have donkeys!

3, why were horses domesticated?

In fact, the domestication of horses was an extremely accidental result. Moreover, many people may not have imagined that the evolution of horses actually occurred in North America, not in Eurasia and Africa. Generally speaking, the evolution of horses has gone through: Eohorse - Interhorse - Three-toed horse - Upper New Horse - True horse . The stages are as shown in the figure below,

The horses we come into contact with are all horses that evolved independently in North America and then migrated to the Eurasian continent. When did this horse arrive in Eurasia?

The answer is, the Pleistocene Epoch, which is from about 2,588,000 years ago to 11,700 years ago, geological era Quaternary era. How does

get from America to Asia? I believe everyone knows that it is Bering Strait .

During the last ice age, the Bering Strait was frozen, and horses came to Asia from here.

Human beings also arrived in North America through the Bering Strait at this time. Therefore, American Indians and Asians are actually of the same origin (one day in the future, will it be possible that the United States has been an inseparable part of China since ancient times? Hahaha).

4, about domestication

Domestication is a very common topic. We humans, from the Neolithic Age around 9,000 BC, with the development of agriculture, we began large-scale domestication, and during this period, we domesticated a large number of domestic animals. The following is a list of large mammals that have been domesticated.

Taking dogs as an example, there are more than 300 dog breeds in the world.

In just a few hundred years, we can domesticate dogs with different sizes as shown below.

Therefore, materials are the key. As long as we have the materials, we can realize anything we imagine.This is also the reason why we need to protect wild animals. Wild animals are a huge gene pool .