Vanguard is now far away from Pluto and is heading towards Earth at extremely high speeds in space.

Over the years, after many modifications, the current Pioneer has been greatly different from the original Vanguard, the outer volume of the entire spacecraft has increased by about 13% compared with the original, the internal volume has increased by 9%, the shape has also changed a little, and more importantly, the core part of the spacecraft, that is, its controllable thermonuclear fusion engine, has been upgraded several times, and has now reached the most advanced point of mastering the technology.

Coupled with the various material upgrades of the spacecraft's shell, interior, and even controllable thermonuclear fusion device, the Pioneer spacecraft can be said to be the fastest spaceship owned by mankind at present, and the ordinary speed of navigation in space Vanguard even surpasses the spaceship technology of the Gaians, of course, this premise is that the curvature technology of the Gaians is not used, and the current distance of the Pioneer from the Pluto base back to the earth has been shortened from the initial nearly one year to only one month.

This speed is already extremely impressive, in fact, according to the theory, if the Pioneer has a certain enough time of acceleration, it can even reach the final speed of sub-light in the universe. Of course, this is just a theory, firstly, such a long acceleration time is simply impossible, and secondly, even if the Pioneer eventually reaches sub-light speed, or only half the speed of sub-light, it will be a disaster for the Pioneer and even the people on the Vanguard.

Because the reason is very simple, the universe is not a vacuum without any objects, the whole universe is covered with various celestial bodies, large and small, these celestial bodies are almost all over the universe, once the speed of the artificial celestial body reaches a certain distance, then the celestial body facing the direction of progress has no time to avoid and turn, if this happens, there is only one result. That is, a collision at extremely high speeds, and the collision produces a huge amount of kinetic energy that can destroy the Vanguard itself.

Therefore, when the speed increases, the danger of navigation also increases exponentially, although the Pioneer uses the brain as the central control system, relying on the rapid response of the brain to maintain safety at such a high speed. But from this point of view. The current critical safety maximum speed of the Pioneer is around this range, and once this speed is exceeded, even if the brain reacts in time, the spacecraft will not be able to adjust its course in such a short time.

Compared with the high-speed Pioneer, the sub-fleet of the Earth Space Fleet, that is, the fleet currently led by Ivan, is still far behind, and according to the flight time of both sides, it is expected that the fleet will not reach the Earth's orbit until one and a half months after the Pioneer arrives on Earth.

"What are you thinking?" Luo Yan had just finished monitoring. got up and came to the bridge, and when he saw Su Yichen standing alone on the side of the bridge, looking at the space outside with some fascination, he was suddenly a little curious. Compared to the ship's extreme speed, the stars in space still don't seem to move their positions, as if they have been shining forever since ancient times.

Stretching out his right hand, he naturally held the left hand of Luo Yan, who was approaching him, Su Yichen raised his left hand and pointed at the stars in front of him and said, "I'm thinking about how big the entire universe is, and how many cosmic civilizations there are in our galaxy." Even including those low-level civilizations like our earth, who are just preparing to step into the cosmic civilization, how many ...... are there. ”

"There must be a lot of them." Luo Yan's gaze followed his fingers and asked, "Why did you suddenly think of this?" ”

"I don't know, maybe it's because it's a little sad."

"Sad? Why? Luo Yan's expression was slightly surprised. With the departure of the main fleet of the Gaia civilization, the war on Earth has ended in the world, and now the nightmare of mankind is finally over. The earth's civilization is about to usher in its own post-war rebirth, and it may not be long before mankind will truly step from a primary civilization to a cosmic civilization. At this time, Su Yichen thought that it would be sad now?

"Sad. Yes! Su Yichen nodded, and said with a solemn expression: "The single cells of basic life have been produced since hundreds of millions of years ago on this planet known as the Earth, and after a long time, the continuous evolution of life coupled with some fate arrangements, finally our human ancestors appeared. Human beings have continued to develop on this planet from nothing, and at the same time explore the mysteries of themselves and nature, after thousands of years, this is step by step to the modern age, and only then has the glory of our time. Someone once said that man is the soul of all things, and man is the darling of the Creator, but in my opinion, this sentence is actually wrong, and human beings can have today completely by their own indomitable efforts and struggles, and every progress of human beings is a great price, and these costs even include the lives and blood and tears of countless people....... ”

Luo Yan understood Su Yichen's thoughts a little at this time, it is true, every progress of human beings is produced at a cost, whether it is people in ancient times in the face of the cruelty of nature and the threat of fierce beasts, in order to survive, human beings gradually learned to hunt, learned to use tools, learned to farm and graze to meet needs, and in this process, countless human beings have paid the price of their lives, but these costs are not in vain, it is with these costs that human beings have grown up step by step.

Historians once said that the history of mankind is actually a history of war, and there is not much time for real peace in the long river of history, and most of them are spent in one war after another.

Because of the war, people invented gunpowder and all kinds of murder weapons, and also because of these inventions, they promoted the development of human science and technology. These, especially in modern history, are even more prominent, since the nineteenth century, after the Western countries experienced the Age of Discovery, mankind officially went from its own place to the world, which led to the most magnificent scene in modern history. In a whole hundred years, Western countries occupied an advanced position in the countries of the earth due to the development of science and technology, so they began to invade the backward East, the beginning of the Opium War opened the curtain of modern history, followed by the First World War and the Second World War, these two wars in the early twentieth century cost mankind a great price, tens of millions of people died in the war, countless cities were destroyed, the state system was destroyed, and people lost their homes. On the pavement. But in the same way, when the war ended, human technology took another leap forward.

Now, the war between the Gaia civilization and the civilization of the earth has come to an end, and peace has returned to the earth and to mankind. But whether it's Su Yichen or Luo Yan. They are well aware of the devastating impact of this war on the planet, including humanity, which can be said to be unprecedented in human history.

According to the current preliminary statistics, the number of human losses in this war has exceeded 40%, and according to the total global population before the war of about 7.2 billion, 40% of it is close to 2.9 billion, which is almost more than the sum of many wars in human history before, and this number is still increasing, because although the war with the Gaian civilization has ended, the chaos in most countries and regions of the earth has not been improved. Driven by the nature of human beings, including the greed of some, thousands of people are dying in conflict every day in some places.

This is just the result of a war between Gaia civilization and earth civilization, after the war, everyone knows that human science and technology will take off further, marking that it is not far off for earth civilization to truly step into the ranks of cosmic civilization.

But it was precisely because of this that Su Yichen felt sad in his heart, after the earthlings really entered the cosmic civilization. Then mankind will inevitably come into contact with more and more powerful cosmic civilizations, just like China in the nineteenth century. When the old empire was opened with Westerners' naval cannons, it suddenly faced the whole world from one country to another, and now humanity will also face the entire universe, at least the entire galaxy, in this case, once one step is not careful. No one can predict what the outcome of the earth's civilization will be in the end.

"The weak eat the strong, and things are selected to survive". In fact, this sentence can be changed to the entire universe as well. The Gaia civilization is just an ordinary cosmic civilization, not a high-level cosmic civilization, and just such an ordinary cosmic civilization almost brought a catastrophe to the earth civilization. In the galaxy, there are many cosmic civilizations that are powerful in the Bigaia civilization. Not to mention these, even Ike's Rand civilization is so glorious, isn't it the same as now disappearing in the galaxy?

Progress, whether it is a good thing or a bad thing, Su Yichen's heart is a little confused at this moment, but he is very helpless, because fate is like a pair of shapeless hands pushing human beings forward, and in this rugged truth, no one knows how far human beings can finally go.

"Don't think about it, maybe Yiqiē won't be as bad as you think, not to mention that we humans are not so fragile, when we enter the cosmic civilization, at least it will be much better than the current situation." Luo Yan comforted her lover softly, she was worried that Su Yichen's psychology had changed because of this war, she didn't want her lover to lose confidence in human beings, and she didn't want to see Su Yichen suffer for this.

"It's okay, I'm just a little sad all of a sudden, don't worry." As if knowing what Luo Yan was thinking, Su Yichen shook her hand, turned around and smiled.

Seeing him smile, Luo Yan breathed a sigh of relief in her heart, and her heart finally let go.

"Have you arranged to go back this time?" Helped Su Yichen straighten his collar, Luo Yan asked.

"Well, I have to meet Professor Wan and Lao Hu first, I haven't seen them for so many years, and I've been thinking about them in my heart." Su Yichen nodded and said: "I didn't expect that I would meet them again one day, I searched almost all over the base before I left the earth base, but I never found any trace of them, I have been wondering all these years, what happened to them, is it okay?" Will we be able to meet again? Hehe, I didn't expect such a day, recalling the scene of the year is the same as what happened yesterday, it's really emotional! ”

"yes, I didn't expect to see Professor Wan again." Luo Yan was also extremely emotional, when they left the Pluto base on the Pioneer shortly after receiving a message from the earth, when they learned that Wan Changchun and Hu Zhijun actually appeared, Su Yichen's heart was surprised and happy, he never thought that he and they would be able to meet again one day, if it weren't for the fact that the war guide communication could not be maintained for a long time, plus other reasons, Su Yichen even wanted to have a good chat with Wan Changchun and Hu Zhijun.

Luo Yan is the same, she is also happy to meet Wan Changchun again, but at the same time, she also thinks of her father, Professor Luo Shaohua. It's a pity that Professor Luo died early, and there are several comrades who were together back then, if they are still alive now, it would be great.

Su Yichen has already made arrangements, he is ready to go directly to the earth base after arriving on the earth, where he will meet Wan Changchun, Hu Zhijun, including Lin Dong, Tian Lao and others on the one hand, and on the other hand, he will enter the earth base as much as possible, relying on the basic authority of the earth base he has mastered to make the earth base serve mankind as much as possible.

The appearance of the Earth Base was completely an accident, and Su Yichen, as a temporary candidate, also obtained the basic authority of the Earth Base because of this accident. However, according to the description of the base system, his authority is limited, and the entire earth base will not stay on the ground for too long, at most only a year, which means that he must deal with a good matter within this year, which is also an important reason why Su Yichen decided to rush back to the earth as soon as the Gaia people took the initiative to leave the solar system.

Compared to the Pluto base, the Earth base is much larger and more complete, and the countless secrets and scientific information contained in it are also of great value. If some more cutting-edge technology can be obtained from it, then when human beings step into the ranks of cosmic civilizations, in the face of other cosmic civilizations like the Gaia civilization, at least human beings will have the ability to protect themselves.

"I heard that the Earth side has already begun to discuss the establishment of a global alliance organization, and several commanders on the Earth Fleet side have also expressed their approval, and the new global alliance organization will completely replace the original Earth countries, which is a big deal, Yichen, what do you think?" Luo Yan suddenly thought of something and couldn't help but ask.

"It's a good thing from the perspective of the overall situation, and those who divide the world will be together." Su Yichen replied with a smile, then shook his head and said, "But I don't want to mix the things of Zhengzhì, we just need to do our thing, what do you say?" ”

"That's right! That's what I mean. Luo Yan smiled and nodded emphatically, the two of them clasped their fingers together, stood side by side on the side of the bridge, and continued to look at the countless stars. (To be continued......)

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