The universe is so big, why can't you find an alien civilization?They may collapse before the interstellar expansion

Our universe is a huge room that is not understood. Since the universe is so large, why haven't you found the clues of alien civilization so far?

Do you have to have an alien civilization? That's it. Our solar system is a star system with a radius of 1 light, which contains 1 star, 8 planets, asteroids and other celestial bodies, and this is just one of the hundreds of billions of galaxies in the Galaxy. And galaxies like the galaxy are so much in the universe. You can try to imagine how small the chance of alien civilization exists, but as long as you substituted this tiny number into the huge cosmic base, the final result will show that the chance of the existence of alien civilization is very huge.

The astronomer Drake combines 8 variables to calculate the number of alien civilizations that can communicate with us in the universe.

These 8 variables include the number of civilizations that may communicate with our communication, the number of stars in the galaxy, the proportion of star planets, the number of planets in each star system, the proportion of planets that can live and live, evolved, and evolved from higher smart creatures. The probability of the probability, the probability of the high wisdom of life, and the proportion of the duration of the scientific and technological civilization in the planet life cycle. Obviously, in Drake’s equation, most of the variables cannot be determined, but Drake still obtains a calculation result through an estimated method. Between 1,000 and 100 million, even if the minimum value is 1,000, it is enough, but we have not received any information from civilization. Why is this?

There are many interpretations of this issue, and one of them is called a "big filter" hypothesis.

The "big filter hypothesis" was proposed by Robin Hansen. He believes that in the process of the birth of smart civilization, there are some key links that are seriously underestimated by us, and most civilizations cannot cross this key The key link played a role of a filter, and most civilizations were filtered out by it. We know that life does not exist above the earth. The wisdom on the earth has a general need to go through the general needs: 1 to have the right planetary system; Single -cell life; 4 complex single -cell life; 5 sexual reproduction; 6 multi -cell life; 7 has enough brain capacity and learn to use tools; 8 we are currently in the stage; 9 has the ability to expand interstellar expansion.

In our opinion, these nine stages are logical, at least the first eight stages, but this is likely to be caused by the "survivor deviation".

In fact, in these 9 stages, there is a very difficult difficulty in one or some stages. Lost. If this hypothesis is established, then another new problem is caused, where is this very difficult stage? If it is in the first 8 miles, we don’t have to worry about it, but if the ninth stage is extremely difficult to be difficult to be difficult The future of human civilization will also be worrying.

In fact, many scholars believe that the big filter is just in the ninth stage, and there are related research support.

Is it so difficult to have the ability to have interstellar navigation and interstellar expansion? In fact, the key to the problem is not here, but if this hypothesis is established, it means that most civilizations will collapse before having interstellar expansion capabilities. Seeing that the cause of civilization is likely to be a population explosion. The growth rate of the population is closely related to the development of civilization. A deductive result shows that from 3 million years ago, about 79 billion people were born in the world, and the population in the world today is close to 7.9 billion, which means that the world in the world is in the world. The total population that once appeared was only 10 times that of the current population.

The rapid growth of the population starts after the industrial revolution. It can be seen that the development of civilization, especially the increase in productivity, has a strong role in promoting the increase in population speed.

It can be seen that if the continuous explosive growth of the world population will inevitably lead to the collapse of civilization. After all, resources are limited and ecological carrying capacity is limited. Maybe you feel that this is not a problem, as long as you control the growth of the population? The problem is not as simple as that, everything is determined by the objective rules, and artificial restrictions cannot change the objective laws. This is as if the number of potatoes is increasing in geometric levels year by year, rather than that of 10 million potatoes, it is impossible Do it. Of course, this is not to say that all this cannot be changed. If the speed of technological innovation can surpass the speed of population explosion, then civilization will not collapse due to the rapid growth of the population.

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