NASA scientists: Alien civilizations may have already visited the earth, but the probes are still in the solar system

In the 1940s, UFOs (UFOs) often appeared in many parts of the world, especially over the United States. In order to find out what they are, in the 1960s, the United States officially started Extraterrestrial Civilization At the beginning, many researchers thought that it would only take 10-20 years for humans to reveal the truth about the search project of, but unfortunately, 60 years have passed, but there is still no progress.

NASA proposes a new plan to search for future alien civilizations

Until today, humans’ search for alien civilizations has never stopped. Some time ago, NASA combined scientific discoveries over the years , And some interesting conjectures put forward by scientists in the process of searching for extraterrestrial life in the past, reorganizing a new plan for the search of future alien civilizations.

And according to the article in the authoritative American scientific journal "Acta Cosmology", NASA believes that aliens may have already visited the earth, and there are some clues that we do not need to go to the world outside solar system to find the answer. Right in our solar system.

NASA plans to conduct an all-round scan of the solar system in the future, and strive not to miss every celestial body in the solar system, so that we can screen and identify which celestial bodies are suspected to be "artificial objects" and see which of them is A probe launched by an alien civilization into the solar system.

NASA believes that although it is difficult for humans at this stage to leave the solar system, or even leave the earth on a large scale, those alien civilizations that were born earlier than humans may Already have the ability to travel through the Milky Way, which means that these alien civilization probes have already arrived in the solar system long ago, or when there were no humans on the earth.

NASA researchers call these "cosmic footprints",It is believed that it is likely to be widespread, and all humans have to do is to re-search for technical characteristics and use big data analysis to finally lock the target. If the "cosmic footprint" is found, even if there is still no contact with the aliens, it also means that the civilization of the universe is definitely not the only one of us.

In addition, there is the "Dyson Ball" proposed by the famous scientist Dyson in the 1960s. Although this is an imaginary product of civilization, NASA believes that As far as alien civilizations are concerned, they really need more resources, and the resources of 's parent star are the most worthy of exploitation and application.

In recent years, many researchers believe that the slow development of mankind is because mankind has been overly dependent on traditional resources and has been unable to completely popularize and apply new energy sources. For example, nuclear fusion energy, which also leads to humans The available resources are limited, and traditional resources cannot promote our rapid development in the short term.

So, if one day in the future, human telescopes can discover "Dyson spheres" or a large number of "artificial celestial bodies" around other planets in the universe, then there is no doubt that there may already be a civilization there.

Should humans really look for alien civilizations?

Although mankind has made no progress for many years, many researchers believe that all the past research is paving the way for the present and the future, and given the current level of human science and technology, NASA believes that in about a few years, mankind You can find alien life.

However, a new question has also arisen here: Should human beings actively seek out alien civilizations? In Liu Cixin 's novel "Three Body", he mentioned a very interesting point: the universe dark forest law .What does it mean? To put it simply, there are many civilizations in the universe, but no civilization is willing to expose themselves.

Of course, it is not absolute, except for humans. When humans invented radio more than 100 years ago, human signals had already been transmitted. Today, if there is an alien civilization on a planet within 100 light-years in diameter from the earth, then they may have received humans. The signal from civilization.

At the same time, since the 1970s, humans have not stopped actively contacting aliens, which leads to a very passive situation for humans. While other civilizations are silent, we call out in the universe: We are here, perhaps, this is a mistake in itself.

To give an example: If we compare the universe to a big room, every civilization is a stranger who doesn’t know each other and doesn’t know the details. When humans enter this room, the first thing humans should do is Observe the words and colors, then find a safe corner, and observe for a while, instead of taking the initiative to greet you as soon as you enter the door.

Some researchers believe that the way humans have searched for aliens in the past few decades may be a strategic mistake in itself, which may put humans in great danger. We We can only hope: those alien civilizations that discovered us have no evil intentions towards us, what do you think?