Yan Xiuze knew that the question asked by the instructor at this time was not a whim, but a well-known hypothesis that was widely circulated many years ago, that is, the Fermi paradox.
The implicit implication of the "Fermi paradox" is that, theoretically, humans can fly to various planets in the galaxy in 1 million years, so aliens should come to Earth now as long as they evolved 1 million years earlier than humans.
In other words, the "Fermi paradox" shows the paradox that a scientific inference from the existence of aliens can prove that aliens evolved much earlier than humans, and that they should have come to Earth and existed somewhere. b Aliens do not exist So far, human beings have not found any clues about the existence of aliens.
The contradiction between the overestimation of the existence of extraterrestrial civilizations and the lack of relevant evidence is discussed.
And now, thanks to the appearance of the alien Shank, the Fermi paradox has actually been declared to be solved, but in reality, it is not that simple.
The crux of the matter is that since any unofficial "interstellar traveler" in an alien civilization can use his old spaceship to cross major galaxies to the solar system that may be the "horn" of the universe and land on Earth, why is such an individual interstellar traveler the only extraterrestrial life confirmed to have landed on Earth for so many years?
"The arrival of the alien Shank proves that the Earth is indeed not the only island of life in the universe."
The instructor lit up a blue dot of light next to the black figure: "If this is Earth, then the hometown of the alien Shank is likely to be somewhere in the universe far away from us, like here" With that, the instructor pointed out a yellow point of light at the other end of the sphere.
"If the alien Shank's hometown is really so far away from us, then it seems that it is not surprising that there is only one alien on Earth for so many years, but let's not forget that in the words of the alien Shank, we can surmise that this universe is much more than two planets with advanced life" "Rather" With a wave of his hand, the white sphere that had swelled to the size of a watermelon suddenly appeared with dense yellow dots of light, turning the entire white sphere into a dazzling golden yellow "The alien Shank once said that there are hundreds of millions of life planets in the universe, and the vast universe federation with an area of hundreds of millions of light years shows that there are countless lives in this universe, but for so many years, he is the only one who has come to the earth."
The instructor asked rhetorically, "Don't you think it's strange" "You say that" Yan Xiuze tilted his head: "It seems that there is indeed a problem."
So, combined with the way the alien Shank came to Earth, I thought of a possibility that his face became a little gloomy: "You say, is there a possibility that that the alien is actually from another three-dimensional universe" "Parallel Universe" Yan Xiuze's eyes widened.
"No, it's not a parallel universe, it's literally another three-dimensional universe."
"You mean, there are actually a lot of spheres like this."
"Yes, it's very likely."
"So, maybe in this three-dimensional universe we are in, maybe there is really only one living planet, our earth."
Speaking of this, even the instructor subconsciously shrunk his neck, feeling a chill down his spine: "Maybe this is really an out-and-out island." ” After bidding farewell to the instructor, Yan Xiuze came alone to a grass in the suburbs of Reykjavik, lay on it, looked at the pure and clean sky like sapphire blue, and was silent.
He could actually tell that the instructor was trying to ask him some questions about that parallel world.
But for some reason, the instructor failed to ask the question he wanted to ask.
Twenty years are like a day, and after so many years, Yan Xiuze found that the instructor still tied the back of his head with the red rope.
In fact, he was in another parallel world, and he also saw Professor Zhou Jianping, wearing a red rope of the same style on his wrist.
According to Professor Zhou, this strand of red rope is a token of love given to him by his wife.
Yan Xiuze has seen Professor Zhou's wife, who is a gentle, dignified and beautiful woman, and she is close to her.
But in his original world, the instructor never seemed to mention this woman, and Yan Xiuze even suspected that the instructor had never been married at all.
As for where this woman is now in this world, and why the instructor keeps that strand of red rope so preciously, the instructor didn't say it, and Yan Xiuze didn't dare to ask.
Many things may slowly fade from people's minds with the passage of time.
But some things are not erased by the long river of time, but will be refined with the years, lasting and forever clearly engraved in the deepest part of people's hearts.
So why did the instructor change from a physicist to a human combat power limit who once stood on the top of the world, even though Yan Xiuze was curious, but this is another story.
Now, Yan Xiuze just wanted to figure out what secret was contained in this mystery left by Black Star "Is there another three-dimensional universe" Yan Xiuze spread his feet, looked at the occasional cloud passing by in the sky, and muttered to himself.
"If the alien Shank really comes from another universe, then no matter how fast his spaceship is, he will never be able to fly out of this desolate sea where there is only one island on Earth, because this universe is finite and unbounded, and three-dimensional creatures cannot escape from this three-dimensional hypersurface no matter what."
"So, the only way Shank can go home" Yan Xiuze continued to say to himself: "How did you get here, how do you go back" "Wormholes, wormholes" "Hey wormhole" Yan Xiuze muttered to himself, suddenly thought of something, and sat up from the grass suddenly.
"How did they leave the earth?"
call Yan Xiuze, who got up, instantly turned into an afterimage and rushed towards the underground base of the Free Alliance "Shomer Shomer" Xiao Mo turned his head in amazement, looking at the electronic door of the office that opened violently, Yan Xiuze looked anxious and ran in front of him.
"You're in a hurry to be reincarnated?"
"Phew, I have something serious to ask you."
"I still have a bunch of serious things in my hands now, this should be your job, do you know" Xiao Mo complained: "I gave you a tank for twenty years, and my wife divorced me because of this" "Go, go, you don't manage your marriage well, let me carry the black cauldron" Yan Xiuze waved his hand: "I really have something serious to ask you, do you know about the alien Shank leaving the earth ten years ago" "You know, most of the technology on the earth about interstellar voyages now is thanks to that alien."
Xiao Mo wondered: "What are you asking for this?"
"Okay, I knew you did."
Yan Xiuze said a particularly awkward sentence, and then said: "Then I'll ask you again, do you know?"
"How did he leave Earth":