Many people have always believed that before our group of humans appeared, there were other civilizations on the earth.
The earth has existed for about 4.6 billion years and has experienced several mass extinctions. At one time, the masters of the earth may not have been humans, but other creatures with more advanced civilizations. An advanced civilization like
is most likely a fourth-level civilization or . But in our lives, few scientists mention level four civilization. This can't help but make people fall into greater curiosity. How terrible is the level 4 civilization that makes scientists remain silent?
Level of civilization in the universe
The concept of level of civilization was first proposed by the former Soviet scientist Nikolai Kardashev, so it is also called Kardashev level . This is a method used to measure the advanced level of a certain civilization, reflecting the ability of intelligent creatures to utilize resources in this civilization.
In terms of human civilization, the Kardashev level can quantify the specific strength of population, economy and technology.
Kardashev divided civilization into three levels .
First, this civilization is the energy master of the planet where it is located and can dominate the energy of the planet where it is located.
The second is: the civilization can collect the energy of the star system in which it is located.
The third is: the civilization can freely utilize the energy of the entire galaxy where it is located.
According to Kardashev's level theory and through the statistics of the International Energy Agency in 2018, it can be calculated that the current human civilization is only 0.728 level , which has not even reached the level of level one.
If we reach the level , we can control the earth's atmosphere and geothermal energy, then ecological environment problems will no longer exist. When reaching level 2, human beings can freely collect the energy of stars in space. Interstellar travel is not a dream. The energy of this planetary system in the solar system will serve mankind. When reaching level three , the galaxy can become the backyard of mankind.
To put it simply, the first-level civilization controls the resources of its own home star , the second-level civilization controls the resources of the solar system, and the third-level civilization controls the resources of the Milky Way and even other galaxies further away.
One can imagine how strong their control over the universe would be if there were Level 4 civilizations.
Does advanced civilization really exist?
Over the years, people have never stopped exploring extraterrestrial civilizations, resulting in many alien conspiracy theories appearing in the world. As long as it is a phenomenon that the general public has never seen and cannot explain, it will basically be included in alien conspiracy theories.
Human beings believe so much in the existence of extraterrestrial life because of the theory of multi-dimensional universe or multi-dimensional space . This theory has been mentioned in many science fiction films and television works. The world in which humans live is a three-dimensional space. Adding time, it becomes a four-dimensional space.
But the time in the universe is not the concept of time defined by humans. The time in the universe cannot be touched or felt by humans. Not to mention that the time of the universe is so mysterious, even the four-dimensional space of is likely to remain invisible to humans.
The four-dimensional space was proposed by Einstein. On this basis, current scientists have speculated the dimensions of the universe to eleven dimensions.. Therefore, some people firmly believe that there must be a fourth-level civilization in such a huge space.
But why do scientists never mention it?
Hawking once seriously warned mankind: Don't actively look for aliens. Even if there are extraterrestrial beings contacting the earth, don't respond to them. Because civilizations don't know what their purpose is in contacting us, and humans' current technological level is simply not enough to fight against advanced civilizations.
If advanced alien civilizations initiate unfriendly behavior towards humans, humans will only be like tiny ants in front of them.
Level 4 civilizations can not only easily travel through the universe and use various energy sources, but also dark matter that humans have not understood can dispose of at will and convert them into usable resources. This gulf-like difference is daunting to humans.
But those who hold objections do not believe that there is such an exaggerated technology as a fourth-level civilization. They believe that if there is a fourth-level civilization now, according to the Kardashev hierarchy theory, these civilizations have already taken root on the earth.
However, humans have not really discovered aliens. Even if there are some unexplained UFO phenomena, it is not enough to prove that aliens have come to the earth. Moreover, humans have not yet discovered that the energy of the solar system is used or possessed by unknown technologies.
It is best not to take the initiative to explore advanced extraterrestrial civilizations
Of course, there is also a possibility that the creatures that dominate the fourth-level civilization are too advanced and the energy of the solar system cannot satisfy them; or that people have already begun to exploit it, but the energy mined by the fourth-level civilization has not yet been discovered by humans.
Science is rigorous. The so-called fourth-level civilization and eleven-dimensional space are just speculations. No one can provide factual basis, and there is no scientific theoretical support.
Therefore, scientists who represent scientific and technological authority keep silent, which is their responsible attitude towards scientific research.
Exploring the fourth-level civilization will definitely involve dark matter. According to astronomical observations, this inferred dark matter violates universal gravity. If it really exists, it will be difficult for humans to make mistakes during their exploration, and negative problems may also occur in the cosmic environment.
According to Hawking, if itself is not strong enough, do not easily challenge unknown forces . Perhaps the universe has reached or even exceeded the fourth-level civilization, but those advanced creatures have not yet contacted the people on earth, or perhaps they have already hidden on the earth.
But there is a saying that goes well: I cannot move until the enemy cannot move. Even if extraterrestrial civilizations have already arrived among people on earth, we should not deliberately provoke them.
Another possibility is that Kardashev is overthinking and there is no Level 4 civilization in the universe, not even Level 2 civilization.
Just like the mass extinction of life on earth, there have been many big explosions since the birth of the universe. Various extraterrestrial civilizations have already experienced several reshuffles. Those who survived have taken a step back in technology. It will be an extremely long process to evolve to the level of a fourth-level civilization again.
By that time, the speed of human development may have already caught up with those alien civilizations that were once glorious but were forced to start over.
The last possibility is that the universe will not evolve to a fourth-level civilization. It will shuffle the cards every once in a while to maintain the balance of the universe environment. No one can tell for sure, so scientists focus on the present instead of worrying about illusory things.
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