I believe there is! The essence of UFOs is UFOs. Since it is a UFO, it can be called a UFO as long as people don't understand it, so UFOs actually exist. As for the existence of extraterrestrial intelligent life, we can only understand that the earth is not alone in the vast universe if human beings really come into contact with the fifth kind in the future. Humans are looking forward to the emergence of alien civilizations in the universe, and we can't define the universe early. We all need to explore. The so-called UFO refers to UFO. There are too many unknowns in human beings, I believe. The universe is too big for a planet that can live like the earth. I believe there are still many undiscovered things, which does not mean that they do not exist. Just like alien civilization, or four-dimensional space thinks that 1 is another distant galaxy in the solar system. There must be life, either civilization is backward, or it is similar to us, or it is far beyond our imagination. The explanation of the term "UFO" is officially included in the book "Aerospace". The applicant is Mr. Sun Shili, the third chairman of China UFO Research Association. The full text of China Encyclopedia's explanation of UFO is as follows: [UFO] is an aerial UFO of unknown origin. Internationally known as UFO, commonly known as UFO. According to eyewitness reports, its shape is mostly disc-shaped, spherical and cigar-shaped. Flying saucer fever first appeared in 1878 1 year. J. Martin, a farmer from Texas, saw a round object in the air. American 150 newspapers published this news and called it "UFO". 1948+0947 June, entrepreneur k from Idaho, USA. Near Mount Rainier in Washington, nine disks were found flying at high speed in the air and jumping forward. All the newspapers in the United States reported this incident, which once again caused a worldwide UFO fever. Later, reports of the discovery of UFOs poured in, and governments and non-governmental organizations of various countries also organized investigations and studies. Since the late 1940s, the number of UFO sightings has increased dramatically. This has caused controversy in the scientific community. Because UFO is not a replicable thing, or at least it doesn't happen frequently, there is no standard for inspection. So far, an absolutely authoritative view has not been formed in the world. Scientists who hold a negative attitude believe that many eyewitness reports are not credible, and UFOs do not exist. This is just an illusion of people or a misinterpretation of natural phenomena by eyewitnesses. It can be explained by scientific knowledge such as astronomy, meteorology, biology, psychology and physics. They even regard flying butterflies as pseudoscience. Affirmers believe that UFOs are a real phenomenon and are being confirmed by more and more facts, but many UFO experts say that they are not sure that UFOs are alien ships. They think that believing in UFOs should not be confused with believing that they come from aliens. Because the hypothesis from the universe is only based on its flight performance, electromagnetic properties and the impression of witnesses, whether it is correct or not remains to be verified. Some UFO experts also support the "alien theory". Some scholars also pointed out that UFO phenomenon is inconsistent with the known basic scientific laws in many aspects, and the theoretical difficulty of explaining this phenomenon is the main reason why it has not been recognized by modern scientists so far. However, we cannot easily deny the existence of this phenomenon. People have made various explanations for the UFO phenomenon. ① Natural phenomena: some unknown astronomical or atmospheric phenomena, seismic light, atmospheric disk turbulence (some scientists believe that UFO phenomenon is caused by environmental pollution), and earth discharge effect. ② Misrecognition of known phenomena or objects: The factors or objects mistaken for UFO phenomena include celestial bodies (planets, stars, meteors and comets) and atmospheric phenomena (spherical lightning, aurora, magic sun, Gengetsu, Elmore fire, mirage and floating clouds); Creatures (birds and butterflies, etc.). ); Biological factors (human eye residual image, eye defect, ocean lake plane reflection illusion, etc.). ); Optical factors (photo artifacts caused by camera internal reflection and development defects, image overlap caused by window and glasses reflection, etc.). ); Radar false targets (radar secondary wave, abnormal refraction, scattering, multiple scattering, such as reflection of dense layers or clouds or reflection of high temperature and high humidity areas, etc.). ), man-made instruments (aircraft lights or reflected sunlight, re-entry satellites, rockets, balloons, military test aircraft that are working after ignition, searchlights, flares, signal flares, beacon lights, parachutes, secret weapons, etc. reflected in the clouds. Psychological phenomenon: Some people think that UFO may be a pure psychological phenomenon, which comes from the brains of individuals or people. The phenomenon of UFOs is often intertwined with people's spiritual and psychological experiences. There may be some connection between unexplored areas of human brain and UFO phenomenon. ④ The product of highly civilized life outside the Earth: Some people think that some UFOs are navigation tools made by highly civilized life on other planets. Research Status About one-third of the countries in the world are conducting research on UFOs, and there are about 350 published monographs on UFOs. There are nearly 100 kinds of periodicals. Many official and private research institutions are studying UFOs. The world's major research institutions have a group of experts involved in this work, including astronomers, botanists, biologists, doctors and psychiatrists, chemists and physicists, as well as engineers in aviation, civil engineering, electricity, machinery and metallurgy, as well as linguists and historians. In the United States, some universities of science and technology have even formally included the issue of UFOs in their doctoral dissertations. Some universities and air force academies also offer UFO courses. China also established the China UFO Research Association, a non-governmental academic research group with scientific and technological workers as the main body. Similar UFO research organizations have been established in Taiwan Province Province, Hongkong and Macau. The popular science publication UFO Exploration in China was founded in 198 1. Before the 20th century, there were more than 300 relatively complete witness reports. According to eyewitness reports, UFOs are mostly disc-shaped, spherical and cigar-shaped. Since the late 1940s, the number of UFO sightings has increased dramatically, which has caused a debate in the scientific community. Scientists who hold a negative attitude believe that many sightings are not credible and UFOs do not exist, which is just people's illusion or eyewitness's misinterpretation of natural phenomena. Some people think that UFOs are real phenomena. It is being confirmed by more and more facts. By the 1980s, there were about 654.38 million sightings around the world. UFO sightings and sighting reports can be divided into four categories: daytime sightings; Witness the incident at night; Radar imaging; Close contacts and related physical evidence. Some sightings were also filmed. People have made various explanations for UFO, including: ① a natural phenomenon that has not been fully understood; ② Misunderstanding of known objects or phenomena; ③ Psychological phenomena and fraud; (4) the product of extraterrestrial civilization. Many countries in the world study UFOs. There are about 350 monographs on UFOs. There are nearly 100 kinds of periodicals. A group of experts from all over the world took part in this work. China has also established a folk academic research group-China UFO Research Association. The popular science publication UFO Exploration in China was founded in 198 1. B] Classification of Witnesses Until the early 1980s, there were about 654.38 million witness reports in the world. They divide the close contact and whispering between people into four categories: the first category refers to witnessing UFOs at close range without leaving any concrete physical evidence. The amazing experience of an afternoon over Mexico falls into this category. The second category refers to witnessing UFOs. There are also tangible signs of alien visits. Crop circles that have caused a lot of controversy can be classified as this kind of contact. The strange circular pattern that appeared on the Mexican grass not long ago is thought to be related to UFOs. Of course, there is the famous third kind of close contact, which is a real contact-often talking to aliens through telepathy.