What do you think of the connection between the United States and aliens, Zhihu?

I think many countries should have institutions to study aliens. Of course, the United States is no exception.

But whether aliens are found or not, I think the answer is no, for the simple reason: why do aliens only go to the United States when they visit the earth? Or is it only the United States that has the ability to explore space? Moreover, this exploration ability is obviously much more developed than other countries, and it can search for life on the surface of distant planets by leaps and bounds, or receive information transmitted by extraterrestrial life. I don't think this is possible. If the United States accidentally received alien information decades ago, then decades later, other countries will not find it? This is very strange and suspicious.

If there are aliens, they won't just go to America. If space is explored, it is unlikely that only the United States will find or receive information about extraterrestrial life. If aliens have visited many countries, or many countries have discovered the existence of alien life, can they hide it after so many years? I think this is very difficult. Now, there are tens of millions of people who have found UFOs on the earth, which means there are tens of millions of cases. In these numerous cases, 90% can be explained by various reasons of non-alien civilization, and the remaining 10% is bizarre and bizarre, which cannot be explained. In terms of probability, 90% can be explained, and the remaining 10% cannot be explained and cannot be proved to be caused by aliens. Then it is basically certain that this 10% will not be an alien UFO.

The origin of life on earth is still a mystery. Even the most basic, whether life is accidental or inevitable, is a mystery. If it is inevitable, then there must be extraterrestrial life. If it is accidental, the probability of alien life is basically zero. Personally, I tend to be accidental. Think about Darwin's theory of evolution, that is, there is a gene mutation before natural selection. The factors of gene mutation are uncertain, from high-level changes to low-level changes, some changes adapt to the environment, and some changes cannot survive. These accidental changes, or changes caused by accidental conditions, are multi-directional. Naturally, dominant genes will be selected and genes that are not suitable for the environment will be eliminated. If even the evolution of life is accidental, it is not accidental that the probability of life being born is basically zero.

If our present knowledge of physics is correct and applicable to the whole universe, if there is life on other planets. So, what form did their accidental evolution take? What are the chances of intelligent life? All this is unimaginable. If they also have intelligent life, how far are they from the earth? How did they get to the earth? When they found that there was life on the earth, did they ever think about what the earth would look like after thousands of years of space navigation? Is such an expensive interstellar voyage worth it? Or spend so much money on the map?

The universe is vast, reaching the diameter of tens of billions of light years. At present, it is also very empty, and the radio waves we send out have no memories. What our telescope sees is terrible silence. We can't be too sure. But we can basically be sure that no aliens have been found on our earth (including the United States).