"I just want to tell you everything I know. However, I still cannot guarantee the authenticity of the information in my hands. "This is top secret, it involves the interests of the country and the living conditions of the people, and I have to think about what to say." ”

Ding Mu also turned his body around, found a comfortable position, and then hugged Carly in his arms, and said coquettishly: "Carly, you should tell the child a story, I judge for myself." ”

Hearing Ding Mu say this, Carly suddenly felt a lot more relaxed. She thought for a moment and began to say, "Well, then you should be listening to the story." All stories stem from life being higher than life. Authenticity is your own business. ”

"Good, good. Let's talk about it. "Ding Mu is quite anxious.

Carly smiled and said, "You know where we are." ”

"Of course you know, we're on Earth. ”

"Come, come, use your knowledge to describe the Earth's place in the universe. Kali said.

"I know that the Earth is very small in the universe. Although the earth is one of the eight planets of the solar system, it is only an ordinary planet compared with the solar system; the solar system is already very large, but compared with the Milky Way, it is only one of more than 300 billion star systems; outside the Milky Way is an extragalactic galaxy, and there are more than 100 billion extragalactic galaxies about the same size as the Milky Way, and the size of the galaxies varies greatly. Ding Mu sighed, "Every time I see such a huge amount of data, I really feel that there is no value in doing any work." Under the galaxy, small human beings!"

"You've done a great job. "As far as I know, the Milky Way is a very barren galaxy, and there are only a few small civilizations like Earth in the more than 300 billion star systems in the entire galaxy. The Earth is in the Milky Way, a bit like your kingdom of St. Ding in the Pacific Ocean. It's just a metaphor, and the actual density is much smaller than that. ”

Ding Mu basically understood, and then spoke: "You mean that the entire galaxy is like a sea, and the earth is like an island. In other words, there are more suitable places in the universe for human habitation. ”

"To be precise, it is not more suitable for human habitation, but more suitable for the emergence of civilization. "Humans are not the only intelligent beings in the universe. In the vast universe, there are many galaxies that are extremely large, let's just say that elliptical galaxies have a diameter of 3,300 light-years to 490,000 light-years, spiral galaxies have a diameter of 16,000 light-years to 160,000 light-years, and irregular galaxies have a diameter of about 6,500 light-years to 29,000 light-years. The mass of galaxies is generally between 1 million and 1 trillion times the mass of the Sun. The Milky Way is a barred spiral galaxy with a huge disk of galacies about 100,000 light-years in diameter and about 3,000 light-years thick. In such a large spatial dimension, the density of civilizations is different. We habitually take ourselves as the center, and call everything else extragalactic galaxies, but the place with the highest civilization density is an elliptical galaxy tens of millions of light-years away from us, the light star system. There, there may be thousands of planetary groups in a single star system, all with a unified civilization and government. ”

"It's an eye-opener, but it's not hard to imagine. "Ding Mu's sudden impulse to conquer the sea of stars rose.

"I seem to be a little off topic. With her legs curled up, Carly snuggled up beside Ding Mu and whispered, "Actually, there are many visitors from outside the world who have come to Earth. There are also many myths and legends. Many legends of flying to the sky and moving mountains and seas are miracles of aliens. It's just that almost all aliens who come to Earth have one characteristic, they tend to be explorers rather than colonizers. Because the moat between the Milky Way and the extragalactic galaxy cuts off the meaning of obtaining resources. As far as I know, the energy consumed by extraterrestrial technology to fly across galaxies is countless times greater than the combined value of the resources of the entire Earth. ”

"So?" Ding Mu said curiously, "this is the first time I've heard of it. ”

Carly said in a slightly solemn tone: "So, for alien creatures, the greatest value of the earth is the earth civilization itself. Because resources cannot be transferred, but civilizations can be replicated. All the civilizations we create, music, art, architecture, mathematics, physics, chemistry, and literature, are the contributions of earthlings to the entire universe. And in some theoretical research, our achievements are not low. ”

Carly's pillow story doesn't have a particularly strong logic, it can be said that she can say whatever comes to mind, but Ding Mu understands a lot.

"I understand, no wonder, alien civilization can't easily influence and change the earth's civilization, if it changes the earth's civilization and stifles the creativity of the earthlings, then for alien creatures, the only value of the earth will not exist. ”

"This is also the cosmic convention of all higher civilizations, the convention of the Association of Interstellar Explorers. "Until we leave the planet, our lives will not be disturbed under normal circumstances. However, it is not excluded that there are others who hold a different point of view. They believe that only through the integration and exchange of civilizations can we create a better civilization. ”

"I agree with that, too!" Ding Mu's eyes flickered, "It's obvious. Our Dahua culture is very good. Eclectic. ”

Seeing Ding Mu's reaction, Carly smiled and said, "There is a premise for cultural exchange and integration, that is, the level of civilization cannot be too far apart. Otherwise, there may be a situation where communication cannot be achieved. ”

"That's right. Ding Mu also quickly realized this, "In fact, the current civilization is very mature, political, economic, military, and cultural, and it is time to communicate with extraterrestrial civilizations." ”

Carly also said: "I think so too, there are alien civilizations that are already in contact with the relevant departments of the United States, relevant parties and even some companies." Once we enter the era of artificial intelligence, the speed of technological progress will be unimaginable. Most of these are original to the humans of the earth!"

"What role did alien civilizations play?" Ding Mu said.

"The character is a bit like a traverser. Carly used a phrase commonly found in the Great China Network, "A traverser may be in front of the scenes, may be behind the scenes, may control a huge amount of power, may have the ability to master unpredictable prophets, and may have a level of technology that surpasses the contemporary era." However, at most, they provide a direction, and the real realization is up to us earthlings ourselves. It is said that compared to other races in the universe that may transmit knowledge and genetic knowledge through bloodlines, the greatest advantage of human beings on Earth is the ability to learn, unlimited imagination and creativity, and the ability to reproduce. The more people, the more ideas, the more creativity. ”

"I see. Thoroughly understood. Ding Mu said, and his hands and feet began to be dishonest, "Carly, let's give full play to our human strengths now!"