The old cat suddenly smiled.

"That's right. A passer-by who was going home to clear the toilet was suddenly caught saving the world. What could he do?"

"If you give me a howitzer, I can still fire the cannon at his mother." Tang Yue said, "It's a pity that I only have a toilet leather shovel in my hand."

"Then pick him up and pull out his mother."

"What if it doesn't work?" Tang Yue asked.

"Then use the spatula upside down."

·

·

·

By the evening of the next day, the Mars Stray Dog malfunctioned for the first time.

This old dog, riddled with scars and achievements, finally couldn't hold on any longer. It spent its entire life throughout the entire Mars landing program. For more than ten years, the stray dog ​​has been the team's most capable assistant, with great hard work and merit.

It has also reached an age approaching retirement.

Its successor has been designed and is a Mars rover that is larger in size, more technologically advanced, faster, and has greater endurance. It is said that it can travel long distances for two hours at a speed of 45 kilometers per hour on a single charge.

Far from being comparable to the walking tractor of the Martian Stray Dog, when the new car is in place, the old Stray Dog will obviously be abandoned. Everyone likes the new and hates the old.

Tang Yue once touched the wheel of a stray dog ​​and lamented that the pioneers would eventually be buried by history. Who will remember this lonely old dog after a few years?

But the old cat said this is a good thing.

If people in the future are still thinking about us, then it means they are not looking forward.

We worked hard to pave the way for those who came after us, not for them to stand here and remember us.

"How is it going?"

The old cat was sitting in the cab and poked his head out to ask.

The person who discovered the fault was Tang Yue. It was about to become night. Tang Yue wanted the Martian stray dog ​​to move a little bit to a higher place, but as soon as he stepped on the accelerator, there was a slight abnormal sound under the car.

Alerted, they did not dare to start the rover again and immediately began maintenance.

Tang Yue squatted beside the wheel of the rover, with an open access cover in front of him and a tool box spread out beside him. "It's a small fault. The transmission shaft is a little loose. Just tighten it. It's not a big problem, whether it's a person or a person."

Mechanical, at this age, you are full of problems..."

Tang Yue knocked on the outer shell of the stray dog ​​with a wrench, then removed the cables under the outer shell and glanced inside. As a mechanical engineer, it is his job to repair the stray dog. No one is more familiar with this dog than him.

.

"Can it be repaired before setting off tomorrow morning?" the old cat asked.

"No problem, I've checked it, and there shouldn't be any other malfunctions in a short period of time." Tang Yue nodded, "But there is still a long way to go, I hope it can stick to its destination... Gouzi

Oh, Gouzi, whether we can get out of this desert alive depends entirely on you. You must be more reliable, and if you die, wait until you have completed the mission before you die."

It's a pity that the dog can't speak.

Otherwise it would definitely bite the man to death.

"We have to avoid more complex terrain in the future, especially steep slopes and cliffs. Judging from the current situation...the transmission is very badly worn, and the stray dog's climbing ability is not good. The ancient dog you encountered during your last trip...

The Great Wall, it better not appear on our way again." Tang Yue sat down on the ground, "otherwise we will have to get down and push the cart."

"Don't worry, the Great Wall is to the west of Kunlun Station." The old cat said, "And we have been walking in the northeast direction. We are going in the opposite direction. There is no chance of encountering it again."

"Who knows?" Tang Yue shrugged, "Maybe the group of super-ancient Martians who built the Great Wall actually built a siege city? A circular city wall was used to include the Ixi Plain - to resist certain body types.

Huge foreign invasion."

"Stop talking nonsense." Old Cat said, "The Great Wall was formed naturally."

Tang Yue was startled.

"Isn't it built by super-ancient Martians?"

"Of course not. There is a high probability that there has never been any intelligent civilization on Mars. Life may have existed on Mars in the distant past, but no advanced intelligence was born. The ancient Great Wall I encountered last time looked bizarre, but it was actually the natural

"It's a miraculous workmanship." Lao Mao explained, "After returning to Kunlun Station, I spent a long time analyzing the reasons for its formation and used the workstation to simulate it. The computer told us that the most likely reason is geological activity and wind erosion."

"Is that all?"

"That's just it." Old Cat nodded, "Most things in this world are actually not as bizarre as you think. Some things may seem incredible at first glance, but they actually have quite simple principles behind them."

"I compared the remote sensing analysis data from previous years and found that the two sides of the Great Wall have different geology. It is actually the dividing line between two huge rock formations. The rock formations will be broken under the action of wind erosion and gravity, just like ice caps and icebergs.

Relationship, and water will accumulate in low-lying areas, and the ice crystals condensed by water at low temperatures will reduce friction, which makes it easier for rocks to be transported and accumulated. This process is very slow, but it can accumulate over a long period of tens of millions of years.

Pick up enough rocks and they'll look like a city wall after being buried in sand."

Tang Yue was a little disappointed.

Lao Mao is always like this, helping you explain the reasons behind the problem clearly without leaving any room for you to question.

If there is no doubt, there will naturally be no reverie.

Tang Yue once thought that Mars was a huge civilization relic. What a romantic fantasy. Every inch of land he walked on had been walked by other intelligent creatures tens of millions of years ago. They built magnificent high walls.

If you can't see the edge at a glance, there will be vast and prosperous cities with roads extending in all directions and extending to every corner of the world. Although this great civilization has been completely lost in time, a glimpse of its ruins can still make people feel...

My heart was shocked and in awe.

But Lao Mao's analysis brought him back to reality.

There have never been any Martians.

There are no high walls or cities.

There is no great civilization.

Just rocks and sand.

"Can't you leave a little room for my imagination?"

"Keep it." Old Cat said, "The simulation results are only 99.7% consistent with the actual situation. Your Martian civilization exists in the remaining 0.3%."

"0.3% is enough." Tang Yue said, "Do you believe it? Such a high probability is enough to give birth to a Middle-earth world."

"Gandalf the Grey?"

"Yes, Gandalf the Grey."

Tang Yue pointed to the sand dunes in the distance.

"One hundred and fifty million years ago, in the distant Third Age, the gray robe wizard Gandalf stood on that hill, raised his wand high, looked to the west, and discovered Sauron's dark army. From then on, a vast army
Chapter completed!