have aliens come to earth?

Generally speaking, in theory, aliens have really come to the earth, and they have also produced many traces of civilization that are difficult for modern civilizations to reach. In some sense, these are aliens. Creation, and on the other hand, the universe is too huge, so it is because of this that there must be aliens. Generally speaking, it is also because of the following reasons.

1. In fact, I have to say that aliens seem to have confirmed that they have come to the earth, and they have also left a lot of brilliant buildings on the earth, so they are more worthy of human exploration.
In fact, I have to say that it seems that aliens have indeed come to the earth, and they have brought great splendid buildings to the earth, and because of this, people need to continue to explore and discover, to help you better understand the civilization and prehistory of alien planets. civilization.

2. Aliens definitely exist, but because of the limitations of technology, human beings have not yet discovered the existence of external human beings.
In fact, for us, it is up to him to judge, and because of this, it must exist in the shape, but because human technology has certain limitations, it is said that people’s observation of the world still needs to be further explored.

3. Most of the time, the existence of aliens is inevitable, but because of the level of human technology, it is difficult to really explore aliens, or it may be deliberately avoided by aliens, so it has not yet been discovered.
In fact, it has to be said that aliens definitely exist. In some senses, if they are too large, it is precisely because of this that the existence of no shape provides the possibility, but on the other hand, it is precisely because there are many problems with aliens, may also deliberately avoid humans, so humans have not yet discovered aliens.

In fact, for us, aliens have indeed visited the earth, and they have left many brilliant relics. In some respects, these are traces of aliens coming. On the other hand, the appearance does exist, but The reason why humans cannot detect aliens is also that there are many flaws in technology, so people should rely on the development of science and technology to better explore the universe.