[40 years of the era of crisis, see the earth again]

He knew he was getting old.

In the silence, he looked at the world outside the balcony of the panoramic window: the urban forest was everywhere, and the high-rise buildings were like tall and thick trees, forming this forest floating in space.

In the space city, above the buildings, there are flying locust-like flying cars circling. Looking at the whole building group from above, you can see some cylindrical corridors zigzag and hovering in them, interspersed back and forth, ups and downs, like a sinuous python. These are the rails of the vacuum tube train, which has a high degree of vacuum inside, and the maglev train is running inside these tubes.

He looked around the window. Gradually, the whole ground showed some curvature, and the buildings on the slope gradually skewed, like the Leaning Tower of Biza. Of course, this is for yourself.

The ground of the Space City gradually stretched overhead, and gradually became ethereal, and it became smaller and smaller. The higher you go, the more faint it becomes, looking like a mirage.

He didn't know if the "ethereal" he saw was an illusion, but what he could be sure of was that the entire space city was a cylinder, and the people who lived were "little ants" "crawling" on the inner wall of the cylinder.

This design is to solve the problem of the gravity environment of the space city, because of the rotation of the space city, it provides a centrifugal force for everything inside, if the city is built on the inner wall of the cylinder, it is just this centrifugal force can make everything in the city adhere to the inner wall, thus imitating the gravity environment of the earth.

He looked up, and suddenly saw a mirror image of himself through the glass: he was sitting on a chaise longue in his old state, with a few silver hairs mixed with the black hair on the top of his head, and the wrinkles on his face under the black and white hair seemed to be a little more, as if the lake was blown by a breeze, and there were ripples. The eyes are slightly squinted, and he already has the kindness of an old man, but he no longer has the same brightness as before. Although he hasn't really aged yet. But the galloping moment of his life has passed, the active and vibrant time has become a thing of the past, and what is left now is only quiet.

…… Everything is quiet.

In fact, he lived a very full life. The moment of galloping and flying in time is still on Mars. He didn't know where he got the courage to infiltrate the "negative civilization" army on Mars, became the greatest and most successful spy in human history, and successfully cooperated with the outside to save his compatriots who were also the people of the Federation of the Solar System. Ask him about his life's work, that is, at this time.

At this time, he has a cup of tea in his hand, and the water lies quietly in the cup, and the tea leaves float and soothe, soaked in the water, as quiet as himself.

I don't know how long later, on the port of space entry and exit, I vaguely saw a twinkling star flying out, fading away, it was the spacecraft leaving the port, and the light from the fusion reactor flashed at the back of the tail. This is probably like my young self, young and flying, living up to expectations.

Soon, he will also become this star and fly out of the space city.

…………

From the cabin window, you can see the earth, and from here, the earth is a dim point of light, if it is not extraordinary, it is too ordinary. It is just a planet, an ordinary star, revolving around a sun, and the sun is only one of the stars in the universe that is hidden in the Ganges.

But it is on this planet named "Sun" that Earth was once the birthplace of glorious human civilization, and now, this birthplace is not so important, not to mention polluted.

Liu Shaoming is still sitting at home, looking at it with an old age. However, he was lying in a hibernation warehouse. In fact, he did not "look", his eyes could not see anything, he could not feel anything - he was asleep, in other words, he hibernated on a long voyage.

The AI estimates that the voyage time is 132 days and six hours. Considering the time problem, Liu Shaoming chose to sleep during the flight. (The vast majority of ships are equipped with human hibernation devices.) ）

In the hibernation chamber, ultra-low temperature has penetrated every part of his body, and the extracorporeal life maintenance system is still working, and as his eyes are closed, he is about to temporarily jump out of the long river of time.

But he always knew that he was about to go to a natural museum of history - the earth.

……

There are a few ice cubes floating in the bubbling black-brown liquid, which can be seen clearly through the crystal clear glass, and the bottom of the water is constantly spitting bubbles upward, forming a little white flower on the water surface, slightly expanding.

"Come on, Brother Liu, do Coke." Ye Ying said. There was not much hair on his head, only a little black and white grass, a lot of prickly beard on his chin, his bearded chin held up the whole kind face, his eyebrows were somewhat with the kindness of Santa Claus, and his slightly squinted eyes were faintly shutting down.

"Come, Ye Lao." Liu Hongxing replied.

In the dim light, there was only one table with only leftovers of wine, and the fish bones lay silently in the sauce, and some side dishes such as green onions and peppers were scattered next to it; There are only some remaining bones left in the rice bowl.

"Pong-" was the sound of a toast.

"Brother, what do you think of the recent politics of the 'country of the sunset'?" Liu Hongxing said.

"Well. I don't think our Solar System Federation can accept their peace treaty, because that would be tantamount to submission, you know hundreds of years ago...... That "Treaty of Nanjing" and "Treaty of Xincho"? That was in the 19th century......"

"Of course I do."

"I don't think there's any difference between the two things in essence."

"If you want peace, you either surrender completely, or you live or die. Then the final thing that will usher in this is peace. Liu Hongxing did not express his opinion, only made a little addition on the side, and he himself did not like to judge something.

"But, somehow, our Solar System Federation actually fucking agreed, and signed, I don't know where to put the dignity of humanity?" The Land of the Sunset was formerly known as the 'Negative Civilization', and they have blown up many of our space facilities. A little earlier, last time because the earth home was polluted, so humans began planetary migration, and in the migration, they all blew up several spaceships, causing some deaths. ”

"Oops. It's just right that it's peaceful, do you really want to keep fighting? In this way, sooner or later, human society will collapse. ”

"The ...... Nation of the Sunset Nation was surrendered in the Solar System Federation Hall on Mars. As a result of its insurgent warlords, they have successively attacked a number of 'falling' bases and strongholds, causing serious injuries. The representative of the federal government of our solar system said that we do not interfere in the internal affairs of other countries, but that we have full authority to surrender ......" suddenly appeared on television.

"Ye Lao, see it. I say that there is hope for humanity. ”

Ye Ying's hand in the transparent cup stopped, the coke inside was still bubbling, and he had nothing to say. Didn't rejoice about it either:

"Don't always call 'Ye Lao' and 'Ye Lao', aren't you also relatively old, why do you call 'old' every day...... Besides, I'm not much older than you, don't I always call you 'brother'. ”

"Oh," Liu Hongxing groaned, his mind still stuck in the previous question.

………

Earth.

Liu Shaoming woke up from the hibernation warehouse and found that after one hundred and thirty-two days and six hours, she had returned to the long river of time.

He was about to push open the door of the spacecraft cabin, and the moment his hand touched it, he suddenly remembered something, so he hurriedly put on a spacesuit.

After a while, the door to the cabin opened, and he saw the outside world.

The place is desolate......

Wait, desolation?

Yes.

After all, the wasteland has no origin, but it is the swaddling product of the birth and evolution of human beings here. Therefore, Liu Shaoming came to this extremely desolate place regardless of the long distance and the long time required. When you come here, you can witness the vicissitudes of life.

The vicissitudes of life have turned into nuclear clouds. There are too many radioactive substances in it, which are the remnants of people who have lived and developed here, and the remnants of people who do not cherish their mothers and defile their mothers.

The original lakes have evaporated and the ground has dried up.

Now, only one person is in the former homeland and witnesses what happened before.

This is a mark left by human civilization, a bad, dark, indelible mark.

Mother Earth, who nurtured human beings, has been made miserable by human beings.

The Earth's ozone layer has been destroyed, which allows more cosmic rays to reach the Earth's surface, so the outside rays and the greenhouse effect have evaporated many lakes and the Antarctic glaciers have been wiped out.

Contemporary historians believe that the root cause of the migration to outer space was that people had polluted the earth so badly that the earth's environment could not survive. and people overexploiting it, depleting the earth's natural resources. The assessment of this historical event is that this is the mistake of human civilization itself.

Liu Shaoming looked around, as if the whole environment was gloomy, and there was no life around.

As I thought, a sound broke the lifeless silence. Liu Shaoming heard this sound clearly and familiarly through the cosmic suit.

Bang bang. Liu Shaoming turned around and looked at the boundless sea, and the back waves in the tumbling were pushing the waves that had already surged in front of them, stirring up a large white splash, which was the tide.

Seeing this scene, the memory in Liu Shaoming's heart came spontaneously. I suddenly remembered how long it had been since I had seen the real sea, and it seemed that I hadn't seen it since I immigrated. Looking back, the most I saw in the Martian world and the world around Jupiter Space City was only lakes, not seas at all. Looking at the present day, he saw the real sea again.

The hands in the spacesuit gloves uncontrollably scooped up a bit of ocean water, but unfortunately, they couldn't touch it directly. The sea water in my hand seems to be much murkier than the sea water I saw when I lived on Earth before, and I wonder if it is caused by pollutants. Although the water is not as clean and clear as it used to be, I still see something I haven't seen in a long time.

Liu Shaoming thought that if there was no pollution crisis, he should enjoy playing on the beach and watching the sea that he saw every day. If there is no pollution crisis, it may ...... There are so many variations that I can't go on here. But thinking about it from another angle, if there is no pollution crisis, I will not move to Mars, there will be no "negative civilization" rebelling against mankind, and I will not save the captives when I infiltrate the "negative civilization" as a spy on Mars, and I am not a savior, I have only lived an ordinary life......

Seon lost his horse, but he didn't know if it was a blessing. He thought.

"Huhuhu." A strong wind blew his thoughts away, and Liu Shaoming suddenly woke up from his fantasy, as if someone had stolen his dream. He returned to reality, looked at the sea, and froze for a moment—

Faintly, a high mountain rose from the sea, like Optimus Prime, standing up to the sky and the earth, advancing with the wind. It is like a giant, walking slowly with solemn steps......

"Sea ...... Howl! Liu Shaoming involuntarily exclaimed, "It's a tsunami!" ”

His exclamation was still echoing in his ears, and in the midst of the scream, Liu Shaoming hurried to the parked spaceship.