Today is the penultimate day before arriving at the destination, the Martian stray dog stopped to recharge after advancing thirty kilometers, Tang Yue still climbed up to a high place to look, but he couldn't see anything.

"There are still thirty kilometers left." Tang Yue looked up at the sky, the sky was getting more and more gloomy, "But I still can't see anything." ”

"Of course, you can't see anything at 30 kilometers, and you may not be able to see anything at 3 kilometers."

This long journey is finally coming to an end, no matter what the demons and monsters are in the end, it is finally going to meet Tang Yue.

They are getting closer and closer to the coordinates of 88.2 degrees east longitude and 17.6 degrees north latitude, on the large-scale map, Tang Yue and the target location are even tightly attached, every time the old cat unfolds the map, Tang Yue thinks that he has arrived, but the old cat waved his paws, pointed to the front and said that there were still a few days to go.

Tang Yue sat on the stone, looking at the sun slowly slanting west from the top of his head, he found that he liked to be in a daze more and more, often sitting silently on the side without saying a word, the old cat thought he was thinking about something, so he didn't bother him, but in fact Tang Yue knew that he was just in a daze, staring at the distant horizon or a certain stone for a long time, and as soon as he came to his senses, the afternoon slipped away.

Oscar Wilde once said that being alive is a rare thing in this world, because the vast majority of people merely exist.

Tang Yue gently tapped on his heart.

"The wind and sand are still increasing." The old cat waved its paws and scratched in mid-air, it couldn't feel the flow of air, and the atmosphere was so thin that it couldn't even blow the cat hair on its body, but the old cat could judge the size of the wind speed according to the turbidity of the air, "In the foreseeable next few days, the weather should continue to deteriorate, and I think tomorrow may be a heavy smog day." ”

"Does it affect us?"

"It doesn't have much impact, tomorrow is the last thirty kilometers, we fully charge the stray dog's battery today, and we can reach the destination directly tomorrow, and we don't need to recharge it." The old cat replied, "It doesn't matter how bad the weather is. ”

"So by the time we leave tomorrow morning, the historical mission of these solar panels will be complete?"

"Yes." The old cat nodded, "We don't have to take them with us tomorrow when we leave." ”

"Nope." Tang Yue said lightly, "You still need battery panels when you return, their historical mission is not over yet, and when you don't need them anymore, they will be considered to have completed their mission...... Actually, I don't think you have to go back immediately. ”

"What do you mean?"

"You can take the rover and the panels to go around Mars." Tang Yue replied, "If you still remember the landing locations of those probes back then, you can even go and see them, Opportunity should still be there in the Endeavour crater." ”

"Oh, I can't find Oppy." "She's too far away, they're in the southern hemisphere, and we're in the northern hemisphere." ”

“Oppy？”

"Opportunity, she's a young girl in the mouth of the NASA guys."

"It's supposed to be an old lady now."

Tang Yue returned to the experimental cabin, and after dinner, the sky outside the window had completely darkened.

There were no other lighting tools in the cabin, and in order to save electricity, Tang Yue turned off all the lights, and the only light source was the small solar emergency bulb. Tang Yue put the emergency light in the center of the experimental cabin, leaned against the bulkhead, sat cross-legged on the floor, wearing Mingguang armor, he couldn't lie down and sleep normally, Tang Yue had been sitting and sleeping for so many days.

The hatch opened, and the old cat entered.

Every night the old cat has to look at the stars, and only come back to rest when it is late at night.

Occasionally, it will say that it is good luck and good fortune when it looks at the sky at night, such as "the star rises in the southeast, suddenly red, shining for several days, and it is auspicious." ”

Tang Yue: Speak human words.

Old Cat: Supernova Explosion.

The old cat climbed into the experimental cabin, turned around and locked the inner hatch, half of Tang Yue's body was illuminated by the dim light, the other half was hidden in the dark, the glass mask was covered with a faint mist, they were like Eskimos crowded in the snow room, lighting a small whale oil lamp, the old cat lay down opposite Tang Yue, and found a comfortable position to curl up in a ball.

The space of the experimental cabin is small, and the old cat takes up most of the land as soon as he lies there.

Tang Yue reached out and poked its belly.

"What for?" The cat's face twisted, and the roll of its eyes rolled.

"Are you fatter than you used to be?" Tang Yue asked, "I remember when we first met, you weren't so fat, why are you getting fatter and fatter?" ”

"Am I fat?" The old cat raised his head and glanced at himself, was silent for a few seconds, and then used his paws to collect his waist and buttocks that were spread on the floor, "I still weigh a hundred pounds, it has always been this weight, it has never changed, is a hundred pounds heavy?" ”

"But your upright height is less than 1.5 meters, and your height is only 1.4 meters...... About 1.46 meters? ”

"Who said I'm less than 1.5 meters tall? My factory height is 150 centimeters that are fully up to standard, that is, 1.5 meters, definitely not what you said about one meter four six, there is an essential gap between one meter five and one meter four, one meter four rounded is one meter, and one meter five four rounded is two meters. The old cat retorted, "There is a full meter difference between the two." ”

Tang Yue's gaze became more and more suspicious.

"Don't believe I'm two meters tall? Keep your eyes open and look good. ”

The old cat stretched its body, its two front paws against the inner wall of the experimental cabin, and then stretched its body like a noodle, trying to reach the hatch with its hind legs...... This was followed by a crisp rattle.

Ouch, my old waist.

The old cat bounced back in an instant, curled up in a ball and shivered.

Let you be a demon.

Sao broke his waist.

Tang Yue adjusted his sitting posture, rested his head on the Mingguang armor helmet, and closed his eyes with a smile.

The old cat snorted, and observed that Tang Yue was already asleep and did not move, so he quietly got up and arched into Tang Yue's arms, rolled into a big hair ball, and closed his eyes.

By tomorrow before the sun rises, they have ten hours to rest.

In this long and quiet night, Tang Yue repeated the same dream, in the dream, he arrived at the place marked on the letterhead, but the destination was not as grand and tall as the Burj Khalifa, nor the strange spaceship and the little green man, only the tomb that did not know who set up there, alone, Tang Yue wanted to see the handwriting on the tombstone, but he always returned to the starting point when he approached the tombstone.

Tang Yue tried his best to see the epitaph, he didn't know how many times he had repeated this path in his dreams, some were as short as a moment, and some were as long as a year.

In the dream, the old cat sneered and said that this is a Möbius belt, do you know what a Möbius belt is?

Tang Yue finally collapsed to the ground and slowly crawled towards the tomb, while the old cat stood on the tombstone and laughed loudly, it had never shown such a hideous and terrifying expression, not like a cat but like a wolf, the old cat shouted at him while laughing:

This is the Mobius Belt!

Do you know what a Möbius strip is?

Do you know what the myth of Sisyphus is?

It's a loop! It's an endless loop! It's an endless loop that you can never get out of!

Tang Yue woke up in shock, opened his eyes, and was covered in a cold sweat.

He took a deep breath in the dark, Tang Yue still remembered this bizarre and inexplicable dream, but he didn't know why he had such a dream, because of the anxiety of arriving at his destination?

It was still dark in the experimental cabin, it seemed that it was still night, the sky was not yet bright, Tang Yue may not have been asleep for long, he groped for the emergency light, looked around left and right, Tang Yue saw canned food and bottled water piled together, and the isotope temperature difference generator, but the old cat didn't know where to go, the experimental cabin was empty, and he was the only one left.