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Millions of years ago, life on earth had evolved and evolved over billions of years, and finally human beings of intelligent life were born. After the birth of mankind, he was full of curiosity and desire to explore various things in this world. It is precisely this curiosity and desire to explore. Tens of thousands of years ago, African intellectuals, the ancestors of modern humans, would walk out of the stable Africa and spread to the rest of the world. .
In addition to being curious about various things on the earth, the ancestors of mankind also had a stronger cognitive desire for the starry sky above. The ancestors of ancient times would also think about the sun, moon, and stars in the sky after leisure.
Most of the ancient ancestors lacked more knowledge and connected everything in the sky with gods, so various myths and legends appeared. A few ancient ancestors doubted this, thinking that there should be another world outside the sky. So I recorded what I thought about and conjectured for future generations to continue to explore and study. This was also the earliest interest in the universe by human ancestors.
As human beings enter the age of civilization, their understanding of the universe is also improving, especially after entering the age of technology. With the help of science and technology, mankind finally walked out of the earth and saw the vast universe. Only at this time did we initially unveil the tip of the iceberg of the mysterious universe.
A few wise men in ancient times guessed that there might be other worlds outside the sky. Since there are other worlds, there must be other intelligent lives. In the eyes of modern people, such intelligent beings are all alien civilizations, but in the eyes of ancient ancestors, they may be gods. Therefore, whether it is an ordinary person or a wise man in ancient times, the cognition of alien civilization is called God.
Since ancient ancestors can think of the existence of other intelligent civilizations in the outer world, we who have entered the age of science and technology are naturally very interested in alien civilizations. Especially after human beings walked out of the earth, exploring the existence of alien civilization has become our important space exploration mission.
Scientists started the “Ozma Project” in 1960 with the purpose of searching for alien civilizations. In order to find extraterrestrial civilization, scientists have exhausted various methods, such as launching Voyager 1 and Voyager 2, both of which carry Kingdee that records information on the earth and humans. In addition to using Voyager to explore alien civilizations, scientists also search for possible alien civilization signals in the universe and the way we actively send human wireless signals to the universe.
Although scientists have exhausted various methods to search for alien civilizations, more than half a century has passed, and until now, we have not found any traces of alien civilizations. Human beings cannot find an alien civilization. Does it mean that there is only one civilization in the universe? If you think so, it’s no different from a frog at the bottom of a well.
Scientists also firmly believe that alien civilization exists. After all, the universe is so big that we can’t imagine it. Carl Sagan said: “The universe is so big, if there are only humans, wouldn’t it be a waste of space”. There are countless planets in the universe. If only the earth gave birth to life, this is obviously unconvincing. What’s more, the existence of the earth and human beings is actually the most powerful evidence for the existence of other life planets and intelligent civilization in the universe.
If there are no other life planets and intelligent civilizations in the universe, it means that the earth and humans should also not exist, and the existence of the earth and humans now strongly proves the existence of alien civilizations. If alien civilization exists, why can’t we find it? The biggest reason is that the strength of human civilization is still very weak.
The backwardness of human technology makes it impossible for us to truly search for the traces of alien civilizations, so some people speculate: humans may be the most backward civilization in the universe. Is this really the case? Someone once suspected that humans might be the most powerful civilization in the universe. In fact, when you think about it carefully, this possibility is almost zero.
Humans cannot be the most powerful civilization in the universe. The reason is that the universe was born 13.7 billion years ago. According to modern cosmology, the universe originated from the Singularity Big Bang 13.7 billion years ago. After the Big Bang, the universe has evolved over hundreds of millions of years and finally stabilized.
When the universe is stabilized, life has the conditions for birth. In the habitable zone of every star system, it is possible to give birth to an ecological planet that conforms to the birth of life. The earliest living planets in the universe may also be born at this time, about 13 billion years ago.
In different time periods, there will be the birth of life planets and the birth of intelligent civilization. The earth was born 4.6 billion years ago, and early life was born 4 billion years ago. It can be seen that the time difference between the earth and the earliest living planet in the universe is more than tens of billions of years. Outside of this huge time difference, how could human beings be the most powerful civilization in the universe, and it is believed that there are many civilizations in the universe that have developed tens of thousands, millions, or hundreds of millions of years earlier than human beings.
If mankind is not the most powerful civilization in the universe, will it be the most backward civilization? In fact, this possibility is very small. There are countless terrestrial planets in the vast universe, and there are believed to be many living planets that were also born at the same time as the earth. Some of these living planets may later become civilized planets through continuous evolutionary evolution.
Since the life planet was born at the same time as the earth, the civilization that grew up at the end will not have the same strength. Some civilizations may be stronger than human beings, and some civilizations are weaker than human beings, and those civilized planets that were born later than the earth have a high probability that their civilization strength is far inferior to that of human beings.
Therefore, human beings will not be the most backward civilization in the universe. Despite this, the status of human beings in cosmic civilization is not estimated to be high. The reason is that the birth time of the Earth is actually relatively late compared to many terrestrial planets. Scientists have observed hundreds of terrestrial planets through astronomical telescopes, and many of them are very similar to the Earth’s ecological planets.
These terrestrial planets, which are very similar to the earth, are older than the earth, and they were born much earlier than the earth. This shows that the earth belongs to a relatively young type of life planet in the universe, so human civilization in the cosmic civilization family may also belong to a new civilization, a low-level civilization that has not really become strong.
According to the four levels of cosmic civilization by scientists, human beings are not even a first-level civilization, at most they can only be counted as a 0.7-level civilization. The weak strength of civilization prevents us from crossing the interstellar space to explore and find other galaxies, so it is normal that we cannot find an alien civilization.
Before human beings became an interstellar civilization, there may be only one way to discover the traces of alien civilizations, and that is to take the initiative to come into contact with humans in the solar system. However, at that time, it was difficult to say whether it was a blessing or a curse for human civilization. Perhaps in the eyes of advanced civilizations, humans are actually similar to ants, and perhaps not even ants. Will humans have a fair conversation with ants? I believe it will not, so once the earth is discovered by advanced civilizations, it may be a disaster for mankind.