Sun Xiaogang remembered that he and Qiu Siyuan had argued about the end of the world 700 million years ago during the last round of earth civilization.

"Now humans have begun to worry about the day when the earth will be destroyed. Scientists are looking for extraterrestrial planets outside the solar system that can be lived by humans with the same environment as the earth?" Sun Xiaogang asked Qiu Siyuan at that time.

"Your idea is really ridiculous." Qiu Siyuan said: "Human beings only want to find planets outside the solar system that can be moved by humans, but they have not considered the fact that three-dimensional bodies like you and me cannot span large-scale cosmic spaces.

With our current technological level, if the living environment on the earth disappears, let alone extraterrestrial planets, even in the space near the earth, we will not be able to achieve the goal of long-term residence. This is because we have not yet been able to break through the advancement of our ancestors.

The minimum conditions for the period of entering space are to first solve the necessary materials for human beings to survive in space for a long time, that is, to develop the physical supplement requirements that can ensure the long-term survival of human beings, that is, to develop a small capacity but high energy to last for a long time.

The material basis for survival - the development of the "Elixir of Immortality". Without this condition, it is simply impossible to rely on growing organisms in space to ensure the long-term survival requirements of a large number of people like on the ground!"

"Oh, yes, yes, yes," Sun Xiaogang suddenly realized: "We are now planning to build a large space station in space or on the moon or Mars to allow more people to travel in space. Isn't this marching into space? We can build

A large space station will be used to grow crops in space to enable humans to enter space."

"Your idea does not take into account the environmental cost issue," Qiu Siyuan said: "If the human living environment on the earth is destroyed, can the necessities of human survival in space be maintained just by growing this crop? No. It must be passed

This can be achieved through the development of mineral resources in space. But if there is no long-term life-sustaining elixir (an artificial food made of minerals that occupies a small area), planting and breeding in a small space can solve the life needs of many people.

It is impossible to use matter. Even if it can be done, it can only be done in the only environment of the Earth's orbit in the solar system. We cannot underestimate the fact that human beings rely on it, the only Earth's orbit in the solar system that is suitable for biological survival. This kind of environment is difficult to find in other places.

turn up."

"That makes sense. Why didn't I think of these questions you raised?"

"There are many things that you didn't expect! Therefore, we currently do not have the conditions to survive in space for a long time. If the earth is suddenly destroyed as you imagine, even if human beings escape from the ground and enter space,

It won't live long. Therefore, it is certain that the earth cannot be destroyed in the short term. Its destruction and the time of human beings entering space should also be synchronized. In other words, human beings' technological level will develop to the point where they can develop

The day when space mineral resources are used to produce artificial food that can no longer be maintained by cultivation will be the moment when the earth is close to destruction."

"Human beings are looking for celestial bodies that have a similar environment to Earth and have water and atmosphere. Once they find it, even if they cannot move directly, they can still survive on extraterrestrial planets by growing crops and raising livestock through space stations and space palaces.

Go down." Sun Xiaogang did not agree with Qiu Siyuan's above-mentioned views.

"Your thinking is too simplistic. Even if a space palace or the like is built on a planet with atmosphere and water, it is completely unrealistic to survive independently on an extraterrestrial planet without the same light and biological chain as on the earth.

Fantasy. Because the light of the sun and the light of other stars are not necessarily exactly the same light. Just because environments suitable for human survival like the earth exist in large-scale cosmic spaces, but they are not common. At present, humans have

Knowing that the Earth's orbit is the only orbit in the solar system suitable for biological survival, this shows that the factors that determine the environment suitable for survival in the universe are very complex and are not as simple as human imagination." Qiu Siyuan said.

"Why?"

"Because the food that human beings rely on for survival cannot be described as rice, noodles, meat and vegetables. It is just a fragment of the human food chain in the biological chain. Without the complete biological chain and food chain that the earth depends on for survival, human beings will not be able to survive.

It is unrealistic to bring a few livestock and a few crops to live independently on the earth. Because it is incomplete to obtain life-sustaining substances from only a few livestock and a few crops, it is difficult to meet the essential substances for life activities required by human tissues.

and trace elements, and once these elements are missing, human life will be destroyed. Therefore, a small amount of food sources that are separated from the food chain of earth creatures cannot satisfy the necessary substances for human life activities. Under the current level of human science and technology, food that is separated from the earth

It is completely unrealistic for human beings to rely entirely on organisms separated from the earth for life necessities," Qiu Siyuan said.

"Maybe you are right." Sun Xiaogang said thoughtfully: "Some of the ideas we Earthlings have may not be realistic. Such as building a moon palace or a Mars base on the moon or Mars, or building a large space station in space.

It would be okay to allow humans to immigrate to that time and so on. If we depend on the earth, it would be possible. But if the environment of the earth is gone, it is unrealistic to bring some edible plants from the earth to maintain long-term survival and reproduction."

"Yes, the current development of human beings can only be based on the earth and develop into nearby spaces. As for migrating to terrestrial planets outside the solar system when the earth dies, it is an unrealistic fantasy."

"Now that you are able to communicate with us in language, wouldn't it be easier to communicate with people on Earth in the future? You can often visit Earth as guests," Sun Xiaogang said.

"I guess things won't be as easy as you think. Our communication with you people on Earth is also a long and complicated process."

"Yes, even if we can communicate with each other like Earthlings, it is not so easy for Earthlings to come to your Kuiper Belt. It is dark and cold there. It is not a place that Earthlings like to go, and there are probably not many

People can go. To get to your place, even if you use the third-universe speed, it will take more than 500 days. For people on earth, it is equivalent to two years in prison. What's more, that small spacecraft can take a person for two years.

Where's the food?" Sun Xiaogang said.

"You're not completely right. If we really have the same relationship as between people on Earth, people on Earth wouldn't need to take a spaceship to go to the Kuiper Belt. There would be no need to walk for five hundred days," Qiu Siyuan said.

"Where can we sit? How many days will it take?" When Sun Xiaogang talked to Cui Jianfeng and others about the views he had discussed with Qiu Siyuan, Lu Tong, who was sitting next to him, asked.

"Through the tachyon transducer, it takes a few seconds."

"Ah," Lu Tong shook his head: "Impossible. Even if Liang Haiming uses the speed of light, it will take seven hours."

"We are not using light, but particles that are faster than light." Sun Xiaogang said: "As long as we install two barter exchanges on the earth and the Kuiper Belt, as soon as you enter the exchange chamber, you will go from Kuiper to Kuiper in the blink of an eye.

Anywhere within the zone transition indoors and out.”

"Like this, it's a miracle on earth."

"Yes," Sun Xiaogang said with infinite emotion: "It's a pity that this miracle is not on your earth, but in our Kuiper Belt."

"I think that in this round of earth civilization, by communicating with the Kuipers and mastering their advanced technology, we Earthlings will be able to have the same equipment as the Kuipers, and we will still be able to fly as fast as the Kuipers can fly.

Where we are." Cui Jianfeng said thoughtfully.

"I'm afraid this is difficult to achieve." Sun Xiaogang shook his head and said.

"Why?" Cui Jianfeng asked puzzledly.

"You know that people on earth have a life span of more than a hundred years, right?"

"yes."

"Human society, as a combination of people, also has a cycle of emergence and death."

"I don't know what you mean."

"As the saying goes, consciousness is a product of matter."

"right."

"Then, human society, as a combination of consciousness, is also a natural product of a collection of matter."

"I still don't understand what you mean."

"What I mean is that human beings, as material bodies of consciousness, have a life cycle of more than a hundred years. And human society, as a collection of people, also has a life and death cycle. And this cycle may not wait for humans on earth to realize their own establishment.

We will exhaust our lifespan before reaching a higher civilized society and fail to achieve it.”

"Really."

"Yes. After human civilization reaches a certain level, its end will also come, and a new round of earth civilization will appear. And the higher civilization that humans on earth yearn for can only be embodied by their descendants - Kuiper humans. Kuipers,

This is the future that people on Earth dream of.”

"Are you saying that people on earth will never reach a higher civilization like the Kuipers?"
Chapter completed!