Live Beautification System

By the way, Ding Mu took the four Tianying people under his command and asked them to find Guo Pingfan. In the war-prone Diamond Country, he has organized an army that has withstood the test of blood and fire. This army is the reserve force for future wars.

Ding Mu thanked the Chinese army for its support, and took his family to a large villa on the coast of California, USA.

His son Ding Yan is here.

Ding Mu came to the United States this time mainly to see his son. Ding Yan is going to elementary school soon, and Ding Mu is planning to bring him back to Dahua from the United States. The reason is simple. Today, the basic education in Dahua is obviously better than that in the United States.

"Dad, Dad!" A handsome young man jumped to Ding Mu's side, opened his hands, and rushed over.

Although father and son have never really met each other, Ding Mu often communicates with him through video. Ding Yan already knows a lot of things. He knows that his father is a great scientist. Everyone around him admires him.

Cheng Qianzhan, Yunliu's old friends, and the so-called loyal ministers of Tuogu, have always told Ding Yan about Ding Mu's glorious deeds, and established Ding Mu into an upright man. Under their influence, a man should be Such.

In addition, the United States is also a country with strong individual heroism. Ding Yan has also been influenced by this since he was a child, and he feels that his father is a great scientist.

Therefore, although Ding Yan has no contact with Ding Mu, he admires him very much. In his little heart, he feels that his father is an extremely great man.

This time, when he heard that his father was coming to see him, Ding Yan was so excited that he didn't even sleep well last night.

Ding Mu picked up Ding Yan and said with a smile: "Yan'er, give me a hug, you've grown so big before you know it. Daddy likes Yan'er the most."

Ding Yan gave Ding Mu a pop on the cheek, kissed him, and then said: "Yan'er likes dad too. Dad, is your research successful?"

Ding Mu smiled and nodded and said, "Well, it was successful in stages."

"Yeah, great." A heartfelt smile appeared on Ding Yan's face, "Dad, can you tell me the story of the earth and aliens?"

Ding Mu nodded and said, "Okay. Dad can tell you a story."

Just when Ding Mu wanted to start talking, Cheng Qianzhan walked in and said, "Young Master, I have basketball class in the afternoon, and we are going to leave soon."

"Grandpa Cheng, I don't want to go to basketball class. I want dad to tell me stories. Dad, can I not go to basketball class?" Ding Yan looked at Ding Mu eagerly, his eyes full of prayer.

How could Ding Mu refuse such a look, so he said: "Uncle Cheng, it's not easy for us father and son to meet each other, let's forget it today."

Of course Cheng Qianzhan would not disobey Ding Mu's words, so he nodded and retreated.

Seeing that Cheng Qianzhan was gone, Ding Yan felt very happy that he could spend an afternoon with his father. He raised his beautiful phoenix eyes and asked like a barrage: "Dad, are there aliens? Aliens?" What do people really look like? Will aliens come to attack the earth? If aliens come, can we win?"

Ding Mu smiled. He was not surprised that Ding Yan asked such a question. Children always like to explore the unknown, especially children who grew up in the United States. They have a strong atmosphere and are not interested in alien civilizations and aliens. , always particularly interested.

Ding Mu said: "Yan'er, let's sit down and talk slowly. You ask dad so many questions at once, so dad needs to talk slowly."

"Okay, okay." Ding Yan smiled and moved the small bench and took two bottles of mineral water, handing one to Ding Mu: "Dad sat on the sofa and drank water, and Yan'er sat on the small bench and listened to the story. "

Ding Mu looked at Ding Yan's cute look and narrowed his eyes.

After taking a sip of water, Ding Mu affirmed: "The answer to whether there are aliens is relatively clear. There are aliens."

"Yeah. I knew there must be aliens." Ding Yan was encouraged.

Of course Ding Mu knew that there were aliens, and his real-life beautification system was left behind by aliens. He said: "The universe is too big, and humans cannot be alone in such a large area."

"Dad, how big is the universe?" Ding Yan asked curiously.

Ding Mu picked up a pen, and then wrote and drew in the notebook where Ding Yan usually scribbled, while saying: "Contemporary astronomy research results show that the universe has a hierarchical structure, is constantly expanding, and has diverse material forms. A celestial system that is constantly moving and developing.

The earth we are on is in the solar system. The planets, asteroids, comets and meteoroids here all revolve around the central celestial body, the sun, and together form the solar system.

There are other planetary systems outside the solar system. About 250 billion sun-like stars and interstellar matter constitute a larger celestial system - the Milky Way.

The diameter of the Milky Way is about 100,000 light-years. The solar system is located in a spiral arm of the Milky Way, about 30,000 light-years away from the center of the Milky Way. "

"Dad, what is a light year?" Ding Yan asked curiously, "Is it a unit of distance?"

"Well, that's right." Ding Mu said, "A light year is a unit of distance. It is the distance that light travels along a straight line in the vacuum of the universe for one year. The speed of light is about 300,000 kilometers per second, specifically 299 kilometers per second. , 792,458 meters.”

Ding Yan did some mental math and said: "One light year is 9460730472580800 meters."

Ding Mu shrugged and said, "Son, you are good at mental arithmetic."

Ding Yan smiled and said: "I learned this from Grandpa Sun. Dad, tell me next, what is outside the Milky Way?"

Ding Mu said: "There are many similar celestial systems outside the Milky Way, called extragalactic galaxies, often referred to as galaxies. Currently, 100 billion galaxies have been observed.

Galaxies gather into large and small groups called galaxy clusters. On average, there are about a hundred galaxies in each galaxy cluster, with a diameter of tens of millions of light-years. Tens of thousands of galaxy clusters have been discovered. A small cluster of about 40 galaxies, including the Milky Way, is called the Local Group.

According to the latest statistics from my personal research, there are at least 2 trillion galaxies in the universe. Within such a large scale, logically speaking, the probability of aliens is very high. "

"But where are they?" Ding Yan asked.

"Hahaha." Ding Mu smiled and said, "My dear son, someone asked you this question seventy years ago. That person was a famous physicist and a Nobel Prize winner. He Fermi, we call this problem the Fermi paradox."

"Oh..." Ding Yan seemed a little disappointed that Ding Mu said this, and continued to ask, "What does the Fermi Paradox mean?"

Dingmu explained: "The Fermi Paradox may be a bit complicated for you. It is about the contradiction between arguments about scale and probability and the scarce evidence. The remarkable size and age of the universe mean that advanced extraterrestrial civilizations should Exists. However, this hypothesis is not supported by sufficient evidence.

The first point of the Fermi Paradox, the issue of scale, is an order of magnitude estimate: there are approximately 250 billion (2.5 x 10^11) stars in the Milky Way, and 700 (7 x 10^22) stars in the observable universe. Even if there was a small chance that intelligent life would appear on planets around these stars, there should be a sizable number of civilizations in the Milky Way alone. This is also in line with the view of the mediocrity principle, that is, the earth is not special, it is just a typical planet, with the same laws and phenomena as other stars.

The second point of the Fermi Paradox is the answer to the scale point: considering the ability of intelligent life to overcome resource scarcity and its tendency to expand externally, any advanced civilization is likely to search for new resources and expand the star system in which they live, Then there's the foray into neighboring galaxies. Because 13.7 billion years after the birth of the universe, we have not found any reliable evidence of the existence of other intelligent life on the earth or elsewhere in the observable universe; it can be considered that intelligent life is very rare, or that our general behavior towards intelligent life The understanding is wrong. "

Unexpectedly, Ding Yan understood this all at once and said: "Then I understand. This is a theoretical and logical discussion of whether there are aliens. I think it can be divided into three situations. 1. There are no other civilizations in the universe. Second, alien civilizations exist, but they have not been able to contact us so far. Third, alien civilizations have come to the earth, but we don’t know it.”

Ding Mu said: "Excellent, you summed it up perfectly. Son, but more and more facts tend to prove that alien civilizations exist and have come to the earth, but most people are not yet capable of contacting them. In other words, if you come into contact with them, you don’t know the identity of their aliens. Maybe there is an alien behind you."

"Dad. I'm afraid." Ding Yan suddenly felt a little scared, stood up from the bench, and snuggled into Ding Mu's arms.

Ding Mu smiled, rubbed Ding Yan's head, and said: "Young man, don't be afraid. Dad will tell you that interstellar travel across galaxies in the true sense consumes extremely huge amounts of energy. It requires at least a second-level civilization to compare. Easy to implement.”

Ding Yan asked: "Dad, what is a second-level civilization? What level are we?"

Ding Mu was extremely patient and answered slowly: "The level of civilization I'm talking about is called the Kardashev level.

Based on how much energy a civilization can use to communicate with an alien planet. In other words, only planets that can use a large amount of energy to communicate with the outside world can be counted in the Kardashev level.

It is based on a first-level civilization: the science and technology mastered by this level of civilization can completely control all available resources and everything on their planet. He is the absolute master of the planet and can control the changes, rise and fall of the weather, rivers, land, other creatures, oceans and even materials within the earth's crust at will. It can be said that they are omnipotent on their planet.

Level 2 Civilizations: Can fully utilize the energy of their stars and bring their solar systems under complete control. You can live and travel freely on various planets in the solar system. You don't have to worry about energy problems because you know how to efficiently utilize the endless energy emitted from stars. Society has become highly developed, and development tends to be highly accelerated.

It should be mentioned that if a civilization reaches the second type, then it is almost indestructible. At least all the natural and man-made means known to mankind cannot touch them even a hair. Even if there is a supernova explosion near them, they cannot be destroyed. They could move their galaxy away from the exploding star, or simply harness the energy of the explosion.

Level 3 civilization: It is no longer limited to their solar system, but the entire galaxy where it is located, such as our Milky Way. Can harness the energy of all the stars in the galaxy. This type of civilization is beyond our imagination, and we can only guess at how they survived. According to Einstein's theory of relativity, exceeding the speed of light is theoretically untenable. A galaxy is very large, and it takes millions of years to fly from one end to the other, even at a speed close to the speed of light. Therefore, the third type of civilization is not like in science fiction movies, driving huge spaceships and shuttling through the stars. among. They should have the ability to artificially develop wormholes. "

"Dad, what level of civilization are we at?"

Ding Mu said: "Five years ago, the human index was 0.73 (2 × 1013 watts per second). The growth of the 0.1 index means a 10-fold increase in energy, and the growth of the 0.01 index means the 10th root of 10, which is With a growth of 1.259 times, humans must increase the current generated energy thousands of times to reach the first level civilization. However, this does not include the several technologies I have recently developed. Your father's greatest contribution is to increase this human index. It’s improved to nearly 8.”