Does Fermi’s paradox have an answer? Alien spaceships are all over the galaxy, but we can’t see them

The universe is always synonymous with vastness and mystery. In ancient times, people’s feelings for the universe were more worship and fear. After all, the ancients with backward science and technology could not understand why fireballs (meteorites) fell from the sky. In modern times, Galileo invented the telescope to stimulate people’s curiosity about the universe, when fear gradually disappeared, desire began to become the main theme.

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With the continuous development of science and technology, the means of human observing the universe are constantly improving, and the understanding of the universe is constantly changing. Since then, we know that the universe has existed for 13.82 billion years, our galaxy has existed for 13.2 billion years, and even we know that it has more than 10 million stars.

However, such a huge star also raises a puzzling question about aliens. In the 1950s, nuclear physicist Enrico Fermi put forward a new point of view. He believed that in terms of the time and scale of the existence of the galaxy, if the existing alien civilizations were much more developed than human beings, they should have explored and colonized the whole galaxy long ago. But why have we not found such traces so far?

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In fact, since Fermi proposed this famous “Fermi paradox”, scientists have been looking for aliens. Scientists searching for the extraterrestrial civilization (SETI) even scanned the whole sky with the most powerful telescope in the world, trying to find the “cry” of extraterrestrial civilization. Except for a few confusing signals, human beings have gained almost nothing.

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Some scientists suggest that instead of aimlessly searching for the signals of alien civilization in the vast universe, it is better to specially search for the “technology label” of alien civilization, which is simple and effective. And the “technology tags” include UFOs, alien civilization superstructures suspected of Dyson sphere, and even von Neumann probes. Maybe most people are familiar with UFO and Dyson ball, but they are not familiar with von Neumann detector. In fact, it is a very effective model, it has the ability of self replication.

Astrophysicist Zaza osmanov recently concluded through research that voynoyman detectors do not use too large volume at all, they only need about 1 nanometer volume, which also means that scientists may be right, because there may be such alien detectors in the galaxy that cannot be directly observed by the naked eye.

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Osmanov pointed out that such a small detector does not need a lot of resources for self replication. They can even obtain a very small amount of hydrogen atoms from interstellar dust to achieve self replication, and the replication speed is very fast. Computer simulation shows that if there are 100 von Neumann detectors, they will spread within 1 second (3.3 light years), and the number will reach an astounding 1×10 ^ 33.

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Moreover, despite its small size, this nanoscale machine can emit visible light when absorbing protons. As long as the number of von Neumann detectors is large enough, it can even form a visible “comet” several kilometers long.

Therefore, osmanov concluded that if a strange object with high luminosity is found when observing the universe, it is likely that it is the voynoyman detector sent by the aliens. Perhaps on a certain celestial body, there is also a kind of civilization that is constantly “shouting” to seek “partners” in the universe.

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Interestingly, in recent years, many people have made an amazing guess: will humans become von Neumann detectors? In fact, this idea is not unreasonable, because human beings have a strong ability to reproduce themselves. Although it takes a long time, what if the velocity of time in the space where alien civilization is located is still different from ours? Is all this reasonable?

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In addition, a paper published in Icarus mentioned that human may not be the product of natural evolution, but the product of genetic engineering. One of the authors, Maxim a. makukov, said that this genetic engineering does not have to be carried out on the earth. It may also issue a “key” far away to induce the local organisms on the earth to carry out a certain evolution.

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