Why haven't you found any traces of the existence of aliens so far?

Why did Superman come to earth in 1938 when we didn't find aliens? Aliens threaten the North Pole at 195 1 and 1980. They keep in touch with their homes. Since 1982, aliens have invaded the popular culture of the earth for decades, but nothing has happened in the real world. We can't see aliens walking in the streets or even visiting the International Space Station. They don't even have the basic etiquette to reply to the information we sent them. So the question is why we have never found any aliens. This is physicist english. What is Fermi curious about at 1950?

He raised a famous question about extraterrestrial life. Where did people plant the seeds of Fermi paradox? As another world-famous physicist, he proposed in Paradox that because there are billions of stars and planets in our galaxy, considering that many planets are much older than our earth, the fact should be that there are a large number of planets in the galaxy that can breed intelligent life. If someone makes interstellar travel possible, shouldn't we go to the corner of the galaxy?

But there is no evidence that this has happened. Considering that there are 1000 to 400 billion stars in the Milky Way alone, and the Milky Way is only one of the 2 trillion galaxies we can see, why does Fermi's guess seem more reasonable and correct? Therefore, as long as only 0. 1% of the planets in the Milky Way are potential cradles of life, there will be millions of planets with some kind of life on them or in history, or they will give birth to life in the future, which does not mean that we have not made efforts to contact alien life.

Since 1962, people on earth have never stopped sending radar signals into space, hoping that aliens can finally receive these signals and send them back to Earth. In the past century, scientists have put forward various ideas, hoping to try to capture the attention of potential passing aliens in the future. Moreover, although we have only emitted weak signals in recent decades, since the beginning of the 20th century, our search for radar signals of extraterrestrial life has been a link between the past and the future, but there is still no response. One possible explanation for this problem is that when we fly back and forth between the space station and the earth, we are actually more advanced than other civilizations. Other intelligent life may just be learning to make airplanes, or just knowing the existence of other planets. Our radar signal may already be on its way to them.

But they can't access or understand them, let alone reply to them. Seriously, we can't expect them to jump on their starship and visit us. Similarly, another popular theoretical argument holds that other life forms have taken too long to do this, and a theory called "Man in a Bottle" basically holds that life on other habitable planets develops too slowly. Although there may have been planets with microbial life, or they still exist now, they have never evolved into more advanced and complex forms.

When these creatures are ready to evolve, the planet they live on has become too unstable to support the existence of life. So according to this theory, (life evolution) is an exception and unusual. On the other hand, maybe we are the backward side. Perhaps some physicists in the distant parts of the Milky Way are wondering why no one has responded to their continuous neutron communication signals-if our technology is enough to receive such signals, we will be happy to answer them. Or think about this situation: aliens don't want to communicate with us at all.

Perhaps these transcendental beings are so different from us that they think it is a waste of time to communicate or even intersect with us stupid carbon-based creatures. It's not that they feel unwilling to deign to communicate with us. Maybe they have observed the earth from a distance and seen how humans treat the earth, other species and each other. So they think it is better to avoid the earth for each other's sake. Next, some people believe in a theory called "big elimination", which was developed by Robin? Hansen proposed it in 1998.

Hansen's theory can be summarized as follows: he thinks Fermi's paradox that there should be many intelligent life outside the earth is very reasonable-some of them should be more advanced than us. However, Hansen believes that the civilization of intelligent life will experience a "big elimination" event before reaching the height of interstellar migration-a catastrophic event that is likely to be caused by its own reasons. Of course, if this is true, have we passed the "big elimination" event? Because we have begun to take the first step to the universe.

Or is it getting closer and closer to the "big elimination" event? If they are not determined by fate. Some people say: climate change? Of course, there is another convincing possibility to consider: space is too big and dangerous. Of course, other like-minded scientists think that there should be other life forms there, but even the closest life form is far away from us. Even if the latest intelligent life is only a few hundred light years away from us, it is still out of reach for anyone. Even if a mode of transportation that can withstand the harsh travel of hundreds of light years is established, even if it can really travel at the speed of light, it will still take several generations to reach the desired place.

It is true that it is easier to communicate in other ways than to go this far, but it still takes incredible time, and when any potential alien communication harms us, who knows whether the civilization sent to it still exists? Because when looking for life in space, we are unlikely to naturally turn our eyes to the stars most similar to ourselves. But in fact, there are many smaller stars called low-mass stars. Not only are they more numerous, but their life span is about 1000 times that of our sun, which seems to increase our chances of finding life in them. We don't know whether low-mass stars can really support life. In any case, experts believe that if life will evolve around one of the stars, it will happen in the distant future. Therefore, it is also possible that some exotic species choose to take refuge because the weather here is not in line with their preferences.

Some European researchers think this is a real possibility, indicating that some life forms may think that the universe is too hot to make full use of their resources, so they sleep for millions of years until everything cools down. The technical term is an estimate, and the strategy looks suspicious until you find that these life forms may have got rid of the traditional biological forms, and instead, they have been digitized as part of the super-future interstellar lifestyle, preparing for super-efficient future survival. Because human beings are far from reaching the level needed to compete or even talk with them, it can finally be considered that some life forms may have evolved into digital versions of themselves.

At the same time, another possibility is put forward, that is, we may have really met aliens, but we have not been able to identify them yet. If what we encounter is made up of incomprehensible steam or dogs, or in some form that we can't even visually experience. Will we know nothing about this? Maybe not. On this basis, maybe all the classic science fiction novels and movies are correct. Maybe aliens have found an undiscovered way of life among us and lived here for many years like us, so the question is not why we haven't found them yet, but why we haven't identified them yet. And why they're here.