Suppose the purpose of this piece of soil in your hand is to pass through this sieve.

Suppose that the holes in the sieve will become smaller every time the soil passes through.

Assume that the power of the soil relies on is the power of my hands, and this power will make it smaller and pass through the sieve smoothly. Under these assumptions, what kind of result do you think will be?

Kun threw the dirt blocks in his hand, and the sieve was suspended between the two, constantly changing the size of the sieve hole.

Tang Ling looked at the two simple things in front of him, and the smile on his face gradually disappeared. Then he frowned, and finally there was an irrepressible bitterness in his heart.

Slowly, Tang Ling looked up at Kun: "Is the power of the hand limited?"

Kun narrowed his eyes, and after a moment of artificiality, he replied in a helpless tone: "Even if it is me, the power will not be infinite."

Tang Ling paused for a moment, and a chill appeared in his heart: "So? What about the sieve? Is there an end to the sieve holes of the sieve that become smaller?"

Kun shook his head: "Unknown."

Tang Ling lowered her head and was silent.

This is actually a conclusion that has been thought of for a long time, but no one can accept that such a brilliant civilization was silently annihilated - the Great Filter of the Universe.

This is how Kun used to inform Tang Ling of the first generation of the destruction.

**

This is a guess from the previous civilization. After reading many books from the previous civilization, Tang Ling naturally saw this point one of the pre-civilization's guess theory about the universe - the Great Filter of the Universe.

When it comes to the large filter of the universe, we have to mention a pre-set theory - the Fermi Paradox.

That was a guess that a scientist from the former civilization suddenly emerged when he was looking up at the starry sky.

In that era, the pre-civilization of human beings was far from developing to its peak, and they all had romantic fantasies for cosmic scientists.

In this romantic fantasy, the Milky Way filled with planets is like a sea of ​​human beings, filled with navigation, adventure, discovery, exploration, and battle... like a magnificent era.

After all, due to the existence of human beings themselves, the planet under their feet exists, and intelligent life breaks the number of "zero". According to mathematical theory, this is not absolute "nothing", so the probability of other intelligent life beings being greatly amplified.

But... this is just fantasy and speculation. In fact, humans are lonely and the entire Milky Way is also quiet. At least in that era, there was no sufficient evidence to prove the existence of other intelligent lives.

So a scientist named Fermi was puzzled. According to the existence history of the universe for at least 10 billion years, there are hundreds of billions of stars in the Milky Way alone, and the sun that gave birth to humans is only the younger one. So even considering the limitations of that era and the inability to break through the speed of light, humans should not be so lonely.

But what is the real situation? Humans are really lonely. Even the people from the former civilization tried to send wireless signals to the universe, but they received no response.

This is Fermi's question. Rather than saying that he is asking questions to himself or scientists of his contemporaries, he is asking questions to the universe?

Is there any life besides us? If so, where are they? Why have we never met?

Obviously, this is a theory that makes humans feel extremely lonely and lonely and have lost their fantasy, so in the subsequent time, many scientists have emerged to try to answer the Fermi paradox.

Among these many answers, one of the more recognized answers is the "Cosmic Filter".

Tang Ling's hands were trembling slightly, Kun held his cheek with one hand, his eyes deep, but he didn't know what he was thinking about?

Tang Ling wanted to say something, but she couldn't speak. What echoed in his mind was the theory of the large filter of the universe.

The core of this theory is actually quite simple, just like the example of Kun’s image just now.

Simply put, the entire universe is filled with layers of invisible filters. If we cannot break through these filters, life will not appear first, and even if it appears, it will disappear silently. This is why humans have not discovered other intelligent lives.

The scholar named Robin, who proposed this theory, described the large filter he guessed in very detailed descriptions.

The first thing is to have a planetary system suitable for nurturing life. People with some basic astronomical knowledge will frown after hearing this.

Because of the distance between planets and stars, whether there are organic matter on the planets, and whether it can avoid radiation that exists at any time in the universe...

Look, the initial conditions are so harsh, which is enough to screen out most planets.

Thinking of this, Tang Ling swallowed and looked at the sieve floating between him and Kun. He was too lazy to recall the other eight specific filtering rules of the universe's large filter...

In short, according to that statement, the emergence of human beings is almost infinitely small and infinitely harsh in terms of probability.

If there are other intelligent life, they will also face such harsh conditions. Therefore, under these layers of filters, civilization has been annihilated. How can there be a possibility of discovering, connecting with each other, or even war?

This was just a guess at the time, but now Kun was really sitting in front of Tang Ling, which has completely proved this guess.

But, but... the cosmic filter was derived to the last one, roughly speaking, the last filter, which is interstellar expansion. If humans can break through here, civilization will not be annihilated. At least the instinct of biological reproduction will no longer be restricted by resources, and finally the planet trapped at the foot.

The truth is completely understandable, but what about the first generation? They are so brilliant.

Thinking of this, Tang Ling looked up at Kun again. Before he could speak, Kun sighed: "If you have been locked in a room all your life and no one has conveyed information from the outside world to you, will you know what the outside world looks like?"

"I know what you thought of? What I did is telling you that the reason why the first generation was destroyed was a limitation similar to the large filter of the universe. It was just completely different from the so-called human imagination of the pre-civilization. "After all, humans in the pre-civilization are just people locked in the room, and their knowledge is very limited."

Tang Ling nodded heavily. At this point, there was no need to demonstrate how the first generation of civilization was destroyed.

After all, there is no war or enemies. All you have to face is to reach the end with your own strength and there is no more road.

A trace of sadness filled Tang Ling's heart. He could not say anything, but he knew that Kun only told him the reason for the destruction of the first generation.

The story is far from over.

"Don't forget that the conclusion drawn by the entire universe is that the Star of Origin is extremely important."

"In addition, the pre-civilized universe filter proposed that the conditions for human existence are so harsh, do you think everything is a coincidence? What matters is the key fragment, oh, I mean self-replicating molecules, just like RNA. You have to know that the most critical direction for humans to move forward now is the gene chain."

"What did you think of these two things?"
Chapter completed!