"Isn't this... not?" Li Yunxiao was stunned for a while when he heard Chen Kan's question, and then asked in a low voice. He thought Chen Kan's question was a bit idiotic.

The milk cows nowadays must have high milk production, but one thing is certain, that is, there must have been cows with low milk production in the past. When breeding manually, cows with high milk production must be preferred. Therefore, the genes of cows with high milk production have been passed down. This generation chooses this way, and the next generation still chooses this way. After generations of cultivation, the milk production of cows is very high.

Of course, this matter has a purpose. In order to increase milk production, we specially selected cows with high milk production. Those with low milk production do not even have the right to mating.

"Have you thought about this question carefully?" Chen Kan asked.

"This..." There is indeed nothing. He was a subconscious judgment based on his instinctive reaction.

"If you have time, you can go and read Darwin's Theory of Evolution, which is a very good book," said Chen Kan.

"Evolution?"

"Yes, have you seen it?" Chen Kan asked.

"I've seen it, I've seen it very early."

"Then let me ask you a question. Do you know how many times did Darwin use the word 'evolution' in the whole book?"

Li Yunxiao shook his head. He didn't pay attention to this at all. He focused on the theories proposed by Darwin and the examples he gave.

"Darwin only used it twice at the end of the article, and I believe that if it weren't for Darwin's era, he would never have used these two words."

Although there are different versions and the number of times may be different, the number of times this word will not be used more than five times at most. Of course, this is in the English version.

If the Chinese translation version is full of the word "evolution", then it can basically be judged that the quality of this translation version is too poor, and the translator has not understood Darwin's theory of evolution at all. It would be better if you don't read this version of the translation.

In fact, Yan Fu, the one who is more appropriate to the retelling of Darwin's thoughts, is called - evolution.

Because the word "evolution" always has a meaning from low to high, containing a few extremely strong subjective colors, as if something is driving it behind it. In fact, Darwin didn't say anything high and low at all. He can't say that it is complex and high, and he can't say that it is simple and low.

"Teacher, what you mean is that domestication is actually purposeless, or at the beginning it is purposeless, just like the evolution of nature." Li Yunxiao looked up at Chen Kan and said with some uncertainty.

After hearing his words, Chen Kan smiled slightly, and he still agreed with the answer. Although there were some questions about the language organization, the meaning he expressed satisfies Chen Kan.

"Do you think evolution has a purpose?" Chen Kan asked.

"It should be because there are all for adapting to the environment. Just like moths in suburban London, before the Industrial Revolution, there were more white moths. After the Industrial Revolution, because the air changed, there were more gray moths." Li Yunxiao said.

"Did the moth turn gray on its own initiative?"

"That's definitely not, then..." Li Yunxiao was confused when he said this. He must have not turned gray on his own initiative. Moths do not have the ability to change. Colors do not change at any time. Moths are not chameleons.

"Is the fundamental purpose of evolution really to adapt to the environment?" Chen Kan saw his entanglement, but he did not intend to stop. He asked again. This question made him, who was already very entangled, even more entangled.

He wanted to say yes, but his entangled mind told him that it was no, but he didn't know where the problem occurred. Now his logic is already confused.

"By the way, have you watched "Wolf Totem"?" Chen Kan asked.

"I have read it, but I haven't finished it." Li Yunxiao walked out of the entanglement for a while and said, for some reason, Chen Kan suddenly turned the problem to another book and temporarily put down the entanglement in his heart.

"There is a saying in "Wolf Totem" that is called 'Wolf cannot be domesticated', do you know?"

"Yes, there is such a sentence." Li Yunxiao nodded. He forgot what the original words were, but that's probably what it means.

"Then have you ever thought about a question, how did the dog come about?" Chen Kan looked at Li Yunxiao and asked.

"This..." Hearing Chen Kan's question, Li Yunxiao suddenly raised his head and looked at Chen Kan in surprise. At that moment, goose bumps all over his body stood up, and this question made him sweat.

Yes, since wolves cannot be domesticated, how did dogs come about?

But previous knowledge told him that dogs were domesticated by wolves.

But……

"I haven't thought about this question."

"No, teacher, this..."

"So, before studying, you must first let go of all the inherent concepts in your mind. You should abandon everything that the exam-oriented education gives you. Ask a reason for every thing first. Many seemingly reasonable things, and ask a few more questions, it will be unreasonable." Chen Kan said.

"Just as the teacher said about the origin of agriculture, why can't close relatives get married?"

"Yes, it seems you have done your homework before." Chen Kan said with a smile.

"This is a fine course recorded by the teacher, and it is available online. Many of our classmates have seen it." Li Yunxiao scratched the back of his head and said.

"Oh, I almost forgot that there are some quality courses. It seems that these two memes cannot be used." Chen Kan said with a smile. The quality courses recorded before included all the courses in ancient Chinese history, and I had a little unhappy with the recording staff. To be honest, Chen Kan had forgotten them.

“The teacher’s speech was really wonderful.”

"Don't be exciting, think about the questions I asked carefully." Chen Kan said. With Chen Kan's knowledge reserve, he could tell different things. Even if they had watched the video, it would not have much impact on Chen Kan's courses.

"You have also listened to the courses you have seen, but you don't really understand and think about those problems. Just like the 'mutual training' you just said, people and plants are mutually trained, and there is no doubt that there is a relationship between animals and plants? If so, is it also purposeful? If not, why does mutual training happen to people but not other animals?"

"Yes." Li Yunxiao lowered his head and pointed slightly.

"Go and read the book. You should think about these questions yourself first. If you have any ideas, please feel free to ask the teacher to discuss them together."
Chapter completed!