Does extraterrestrial life exist?
UFOs exist in mysterious ways, and tens of millions of people on earth claim to have seen UFOs. Are these "witnesses" dreamers or liars? Or is there something between a lie and the truth? Is the answer a planet in space, or does it come from human worship of mystery?
The first upsurge of UFO research in the world began with the most famous "Arnold incident" in the history of UFO research. UFO is an English abbreviation, which means "UFO", also known as "UFO" or "UFO". Refers to a moving flying object or astronomical scene, which can be observed with the naked eye or monitored by radar, but human beings can't explain it at present. People who are interested in UFO not only speculate that it comes from a more advanced civilization than the earth, but also use psychological inference to explain this phenomenon from the problems that modern people may face. Descriptions of UFOs include: fast moving or hovering; Silent, erratic or growling when moving; Shapes such as plate, cigar, sphere, ring or ellipse, according to the current statistics, have reached 100 different shapes.
Records of UFOs around the world have existed since ancient times. However, on June 24th, 1947, 1947, the American press reported Arnold's UFO sighting in a large space, which made people all over the world curiously whisper to each other and caused a sensation all over the world.
However, in the exploration of the universe, the exploration of aliens can arouse people's interest most. Although scientists believe that even if there are aliens, it is impossible to fly to the earth, but they have not denied the possibility of intelligent life in outer space.
There must be. But it is not easy to find.
Far away. There are more than 200 billion sun-like stars in our galaxy alone. They carry countless planets. It's hard to believe that none of them are suitable for biological growth. Now people find that the adaptability of life is far wider than previously known. It has been found that living things can survive in an environment without water at all. So it can be considered that there is not only life on other planets in the universe. And there should be quite a few. Of course, if there is life, it may also develop into intelligent life, that is, "aliens."
Having said that. But it is not easy to find them. Because the distance between celestial bodies is far away. Only a handful of dozens of light years away from us. It is unlikely that there will be aliens there. Others are hundreds of thousands of light years away. In this way, it takes twice as long for the radio signal to go back and forth. And the universe is full of all kinds of chaotic radio signals. It is difficult to screen out artificial signals. So it is not easy to find them.
As far as the scientific knowledge we have at present is concerned, it is very difficult to communicate with them. But their science and technology may be much more advanced than ours. It's hard to say whether they can contact us actively. But I'm afraid this is not a good thing. Because the wisdom gap is too big. In their eyes, we are like inferior creatures. This may be a human nightmare.