Fermi immigrated to America.

Fermi paradox does not mean that there is only human civilization in the universe, but points out that the scientific community's estimation of the number of alien civilizations at that time was too optimistic.

During 1950, Fermi worked in Los Alamos National Laboratory. One day, he chatted with several scientists at lunch. At first, they talked about UFOs. This is not surprising. At that time, Americans liked to talk about this topic, and there were many such articles and news. Later, they talked about the problem of superluminal. Suddenly Fermi said, "Where are they?" .

Fermi then calculated the possibility of aliens reaching the earth with a few simple numbers. Through calculation, Fermi thinks that if there are so many alien civilizations, they must have come to the earth. However, we have no evidence that aliens have ever been here. This is the Fermi paradox.

Fermi paradox mainly shows that there are not as many alien civilizations as everyone thinks. Almost 70 years later, although the scientific community has made many search plans for alien civilization, it still finds nothing. This almost confirms Fermi's view that there are few civilizations in the universe.

The rarity of alien civilization shows that the universe is actually unfriendly to the birth and evolution of life. More and more evidence shows that life can be born on the earth, and even human beings have evolved. This is an extremely accidental miracle. This is terrible, which has caused great problems for mankind to find another home after the destruction of the solar system. In the vast starry sky, planetary systems suitable for the continued development of human civilization are really rare.

I think that human beings are produced by the seeds sown on the earth by the survivors of the last super civilization. They don't know what will happen. This is not just sowing seeds on the earth. They also have their own masterpieces in the probiotic circles of other galaxies. It's just that biological production is too harsh on the environment. Often you harvest a hundred things, and most of them are dinosaur-like brain damage. Primitive intelligent creatures like human beings may be just a kind of defective product in their view. It is still far from their goal of racial reconstruction. There must be recreated species similar to ours in distant outer space galaxies. One of the reasons why we can continue to control the earth is that in their view, human existence is better than nothing. The second possibility is that they are busy elsewhere. The third possibility is that time or accidents make them disappear. No matter how likely it is, a breeding environment has been formed in the universe. Being behind on earth is not like being beaten. In order to survive, lagging behind the low-level cosmic civilization is extinction. Therefore, human beings should not be limited to robbing the earth's resources, but should strive to explore outward. Obtaining new energy sources and developing unknown laws of the universe will enable human beings to stand at the forefront of possible unknown competitors and survive. Have a sense of urgency, and don't think that the universe is invincible to the earth. Don't wait until the day when the unknown advanced cosmic civilization of the same origin calls for the destruction of mankind, that is the greatest sorrow of mankind. If, we say if now! If there is only one intelligent creature in the whole universe, then, then, then he meows so well! Think about it, as long as the technology can keep up, it is all ours. It couldn't be better.

195 1 year, the Nobel Prize winner and physicist Fermi suddenly said, "Where are they?" This is the famous Fermi paradox (note: from Baidu).

"Where are they?" It is Mr Fermi's specious question or answer about the existence of aliens. I think this question obviously has the feeling that Mr. Fermi has limited knowledge.

According to the classical physics theory, it seems that human beings can never leave the solar system. According to this, alien civilization will never reach the earth. This is one aspect of Mr Fermi's problem. He seems to imply that aliens exist, but we can't perceive their existence or even communicate with them. So are they.

On the other hand, Mr Fermi may think that due to the uniqueness of the solar system and the earth's environment, human beings and human civilization are sporadic, and civilizations similar to human civilization do not necessarily exist widely in the universe. So I suggest that you say there is an alien civilization. Okay, where are they? Please show me the evidence.

There may be another answer when we break through the shackles of classical physical concepts. According to our current understanding of the universe, the size of the universe is about 97 billion light years, with stars shining and everything multiplying. Even if life and civilization are extremely rare, the possibility that life and civilization exist everywhere in the universe is close to 100%.

Where are they? Yes, we are looking for it in a way beyond Mr Fermi's imagination. Although the current search method may not work, at least we are trying our best to find problems that classical physics theory may not explain, and other more effective theories can solve them. The solution is always more difficult than the reality.

Can we meet? I think so, too. Although all the chemical energy of the earth can't support us to get out of the solar system, what about nuclear energy? I don't think so, because the efficiency of converting matter into energy is not high enough. However, we found that the meeting energy of positive and negative matter is 100%, at least in theory, we solved some problems. Of course, many problems have been found and have not been solved. Finding the problem will solve half the problem.

According to the current speed of scientific and technological development, we can't realize interstellar navigation in a short time, or even discover the existence of extraterrestrial civilization, but what about 1000 or 1 10,000 years later? After all, we have found enough reasons to leave the solar system, because the sun will be annihilated one day. I am quite optimistic about this problem.

Humans will eventually discover the existence of extraterrestrial civilization, and we will definitely visit it.

There are good and bad answers, but once the universe really has only human life, there will be some unexplained problems.

Let's talk about benefits first. If there are only human beings in the universe, human beings can develop slowly without worrying about alien invasion, which will lead to the extinction of human civilization.

Secondly, the development of human civilization is inseparable from the support of resources, so from a macro perspective, the resources of the whole universe are human.

Humans can gradually acquire these resources, spread them out step by step, and finally develop into a super civilization, thus dominating the whole universe.

But when one day human beings really rule the universe, they will find that there is no civilization in the universe except themselves, and even there is no life in the universe except the earth. At this time, human beings will fall into thinking.

Humans will definitely think, why are there only humans in the universe? The answer is that I can't think of it, because according to human's own calculation, there are millions of civilizations in the universe even with the smallest probability.

If these civilizations do not exist, then human beings should not exist, but the problem is that human beings not only exist, but also become a unique super civilization.

Therefore, this is a paradox, and it is an unsolvable paradox. Humans can neither prove nor answer. Since scientific means can't explain it, human beings will inevitably use theology to explain it, so creationism cosmology will reappear on the earth.

For example, the reason why there is only human civilization in the universe is because God only created human civilization, but the question is where God is, and why humans have ruled the universe, but no trace of God has been found, so from my personal point of view, the disadvantages far outweigh the benefits. .......

I always feel that since the earth was born for so many years, it is impossible to have a civilization like ours. The so-called alien civilization may be the civilization that the earth goes out. For example, there have been many advanced civilizations on the earth, and after each civilization, the earth will destroy itself, such as earthquakes and volcanoes. At this time, civilization must develop and go out, which is the same as our exploration of space today. Maybe one day, the earth is not suitable for human survival, so human civilization has developed to a certain extent, and it is already possible to immigrate from other countries. Going out is an alien. A few years later, the earth experienced catastrophe, prospered again and developed civilization again. They are imagining whether there are aliens again! But today's human beings will also visit the earth by UFO, but we will not disturb the new civilization any more. Perhaps at this time, the climate of the earth is no longer suitable for our survival. But the range of activities between us and previous civilizations can only be within a small range of the Milky Way, because speed and distance constrain us to explore more distant galaxies. Little green men, a gray man, is a civilization that has been out several times before. Maybe we'll go out and look for minions.