When looking for extraterrestrial civilizations, why do humans always use humans as a reference?

Because within the scope of the universe known to mankind at present, human beings are the only advanced civilization. Therefore, human beings can only use themselves as a reference to find a more advanced civilization than themselves.

Because I always feel that there is a certain similarity before the civilization, I will do this.

When humans first had a clear understanding of the Earth's place in the universe, the idea of finding a "companion" in an unknown universe took root in their minds. In order to find a "mate", scientists have exhausted all means and even launched satellites with information about humanity and the Earth into deep space, but so far they have not received any response. The whole universe seems to be "silent", as if only the lonely "cry" of human beings can be heard.

If aliens do exist and remain undiscovered by us so far, then this species may have a higher IQ than humans.

This is explained by the fact that the universe is too big, because the universe is so big that we can't figure it out for many years. They may be hiding very far away so that they can't find the aliens.

The universe is very big, big for us to imagine, and the earth is like a drop of water in the ocean compared to the universe, and when human beings explore outer space, they have not found extraterrestrial civilizations, but scientists still have not given up, because they think that such a large universe has any possibility, since there is life on the earth, then in a corner of the universe, there must be a planet, there is life similar to humans, the earth is not alone in the universe, but we have not yet found our partners, There are a lot of possibilities.

First, Earth's exploration of outer space is limited. The earth only began to develop space technology in the 50s of the last century, although science and technology have been developing rapidly in recent years, but in front of the entire universe, we are still too small, we can not even spy on a corner of the universe, with our current space technology, it is very likely that alien civilizations will not be found, but human beings are still constantly sending signals and receiving radio signals to the outside, hoping to get a response from aliens.

It may be that alien civilizations are ignoring us. The earth has gone through about 100 years of scientific and technological development, and has achieved such amazing achievements, and some of those extraterrestrial civilizations have experienced hundreds of millions of years of development, their science has exceeded our imagination, we are an insignificant ant in front of them, even if they are aware of our existence, they will not give us any response, because we have not yet entered their field of vision.

Earthlings and aliens live at different latitudes. Scientists divide the universe into 11 dimensions, and human beings live in the 3rd dimension, and those extraterrestrial civilizations are likely to live in the 4th or 5th dimension, they can see our every move, but we can't see their corners, just like we watch TV shows on TV, different dimensions perceive differently, so we can't experience the creatures of another dimension, so until now we can't find aliens.

It may be because aliens do not exist, and it is only a human guess, and the universe is also very large, so there will be no alien civilization.

Personally, I don't think it exists at all, it's all fabricated and imagined out of thin air

There are two reasons why you can't find an alien civilization, the alien level is too high, and it can't be observed with the current level of science and technology of human beings, or the level of alien civilization is too low, and it may be just a substance, and there is no civilization of its own, so you can't find it, aliens do have the possibility of existing, but the form is difficult to be the same as our human beings.

Because there have never been extraterrestrial creatures at all, there has never been an extraterrestrial civilization.

It is because the scientific and technological power of human beings is too weak, and we have no way to see many things, or it may be because there is only us in this universe.

Should. Because for human beings, the search for extraterrestrial civilizations can help human progress and at the same time find habitable planets, so I think we should vigorously search for extraterrestrial civilizations.

Personally, I don't think it should be. As the saying goes, one mountain cannot tolerate two tigers, and if you find how alien civilizations should communicate, whether it will cause a war and other issues, these are very likely to happen.

I don't think we should vigorously search for extraterrestrial civilizations, after all, human beings currently have limited technology and cannot fight against aliens.

Scientists believe that humans should take the initiative to send signals to find extraterrestrial civilizations, do you agree?

People's level of technology is limited, because we can't detect the whole universe yet. Aliens do not exist at all, there are three-dimensional spaces in the world, etc.