Alien is a general term for intelligent life outside the earth. There has always been a hypothesis about "aliens" in ancient and modern China and abroad, and there are also many strange records of suspected "aliens" in the history books of various countries. But to this day, human beings are still unable to determine whether there is alien life, or even "aliens." The space probe Voyager 1 launched on September 5th, 0977 is the first time that human beings try to contact with "alien intelligence" in a scientific way. In view of the huge distance between planets, they think that even aliens can't fly to the earth, but they don't deny the possibility of intelligent life in outer space.

Reports about aliens often appear in newspapers. Many people claim to have seen flying saucers and even aliens, and have taken various photos about flying saucers. Is all this true or not? Do aliens really exist?

According to people who claim to have seen aliens, most of the aliens they see are humanoid creatures with short heads, narrow mouths and tight clothes.

Others are keen to find traces left by aliens in ancient times. They believe that all kinds of unexplained prehistoric miracles, such as the round masks of figures in the murals in the Sahara desert, the giant stone buildings in Easter Island and South America, and the pyramids, are related to aliens. Some scholars have put forward various opinions that human beings are descendants of aliens or some ethnic groups (such as Maya) are descendants of aliens mating with the earth, but these can only be used as guesses and assumptions, and most of them still lack sufficient evidence.

Carl sagan, a famous astronomer at Cornell University, once pointed out that there are almost 200 billion stars in the whole galaxy, and quite a few of them have planets. It is estimated that there may be as many as one million on these planets. Since life can be produced and evolved on the earth, it is also possible to produce and evolve intelligent life on these planets, and some of them must have evolved more advanced through the current human civilization. Therefore, these astronomers believe that it is entirely possible for intelligent life to exist on other planets besides the earth.

However, Sagan sneered at the news that people often meet aliens around the world. He believes that these are all adding some technologies that humans have mastered to the so-called aliens. Most of the alien images described are human deformation, and the evolution process of life on other planets is very different. The evolution form of alien intelligent life is likely to be completely different from that of human beings, and the science and technology it has mastered will also be completely different from that of human beings. Moreover, these planets that may produce intelligent life are thousands or tens of thousands of light-years away from the earth. Therefore, it is totally unrealistic to think that aliens visit every year or even every day.

Sagan's view can roughly represent the opinion of serious scientists, that is to say, the existence of extraterrestrial intelligent life is completely possible in theory, but most of the news about the discovery of aliens is not credible. However, there are still some events that are considered reliable but cannot be explained by the scientific community at present, and whether some incomprehensible prehistoric miracles are related to extraterrestrial intelligent life is still a mystery.

Scientists have put forward various possible ideas about the existence of aliens at present. These ideas are bold and now seem bizarre, but who can blame human imagination? Maybe these fantasies will become quite big one day.

Can be appropriate!