Do you know if there are any records of aliens in history?

I think there should be aliens, the universe is so big, it can't be only earthlings, and those experts who have explored other planets have found signs of life on other planets.

They sent powerful radio signals to the outside world without stopping for 1 million years. In this way, a small fraction of the above 1 million planets are transmitting this signal, and the proportion of this part is 1 million years divided by 4 billion years, that is. This means that only 250 are sending signals.

If they are evenly distributed in the Milky Way, the distance between the two adjacent ones is about 4,600 light-years. It would take 4,600 years for human signals to reach our nearest aliens. If they receive it and send it out immediately, we will have to wait patiently for 9200 years to hear back from them!

Project Ozma's contacts are only a dozen light-years away from us, so it doesn't really make much sense. For the project to be meaningful, it is necessary to listen to see if every single sun-like star within 4,600 light-years is emitting meaningful signals.

The 41st volume of the "Collected Memories" recorded: "There are people who come by spiral boat. The boat resembles a snail, sinking to the bottom of the sea, and the water does not immerse, a 'boat on the waves'.

Its people are ten feet long, and they weave the hair of birds and beasts to cover their shapes. When the first emperor talked to him and the heavens and the earth opened, it was as if he had seen it himself." They also have an astonishingly efficient source of energy, which can be used for nighttime lighting with just one grain that is "like a millet".

If it is thrown into a small river or stream, "the boiling foam flows for tens of miles". Who are these "people of Wanqu"? Qin Shi Huang thought:

This god man also". So, is there really a man of God in heaven and earth? Throughout the ages, many scholars have been puzzled by this account.

The legend of aliens coming to Earth has been recorded both in China and abroad. The "Memoirs" is particularly unique, recording the friendly contact between the aliens and Qin Shi Huang, who was the dominant party on the earth at that time, leaving a relatively old original record.

According to people who claim to have seen aliens, most of the aliens they see are short, round-headed, narrow-like mouths, and bodysuit-wearing. Others are keen to look for traces left by aliens in ancient times. They believe that the round masks of the figures on the murals of the Sahara Desert, the megalithic buildings of Easter Island and South America, and the pyramids, among other unexplained prehistoric wonders, are related to aliens.

As far as human understanding goes, radio signals are the only viable way to establish such a connection, and it is necessary to further determine how many planets are inhabited by civilized beings capable of sending such signals. If they've been sending this signal since their existence, there should be a million planets that are doing radio broadcasts. But in fact, not to mention algae, even humans did not have this ability more than 100 years ago.

On the other hand, neither will life forms that have been destroyed by technology, and which have themselves been destroyed. Let's not forget that at about the same time as they were able to emit radio signals, humans also developed massive nuclear weapons** that were enough to wipe out all life on Earth. Will aliens destroy themselves at the mercy of war maniacs who have lost their minds?

This possibility may not be completely ruled out.

Are there aliens in the world? Aliens are a collective term for intelligent beings outside of Earth. There have always been hypothetical theories about "aliens" in ancient and modern times, and there are many strange records of suspected "aliens" in the history books of various countries, but now human beings are still unable to determine whether there is extraterrestrial life, or even the existence of "aliens".

Think about it