surface of mars

An excavator ran wildly on the vast Martian land, billowing smoke and dust everywhere it passed.

Captain, where are we going? Qashqai woke up and found that Captain Li Mo was still in high spirits, manipulating the space excavator and running wildly on the barren surface of Mars.

I don't know either! Li Mo's eyes scanned the high-sensitivity radar on the instrument panel, but there was still no suspicious signal.

I don't know? Qashqai frowned. This is already the tenth Earth day after they landed on Mars. Except for the first day when they accidentally rescued the buried Bravery, there was no new discovery. .

The task of punching samples and collecting rock samples has been completed. According to the scheduled plan, they should now take the Navigator spacecraft to embark on a journey back to Earth.

However, Captain Li Mo didn't seem to have any intention of returning. Instead, he drove the excavator wildly all day long, as if he wanted to rely on the crazy space excavator to travel to every corner of Mars.

Although the volume of Mars is only one-seventh of that of the earth, it is not a small excavator that can move vertically and horizontally.

When will this end!

Fortunately, on this voyage, the Navigator carried sufficient energy and food reserves.

Thinking of food, Qashqai's stomach growled. He turned on the communicator and called: Operator, I want to eat fried pork for lunch today. Remember to put more salt and no pepper.

Captain, what would you like for lunch?

As usual! Li Mo looked ahead without looking back.

Oh, a scrambled egg with tomatoes for the captain.

Received! Guan Weiqun's voice came from the opposite side of the communicator.

Today is the twentieth day after landing on Mars, and 2/3 of the energy material carried by the Navigator has been consumed, maybe it is time to go back.

Li Mo decided to start the return plan after detecting the canyon area ahead.

During these twenty days, he drove a space excavator to explore an area of ​​thousands of kilometers, but unfortunately found nothing new.

Perhaps only after returning to Earth and studying the tons of Martian rock samples collected can we know how rewarding this space exploration is.

Could it be that life never existed on Mars? Li Mo carefully steered the space excavator through a ravine.

Beep. Beep. The high-sensitivity radar sounded an alarm.

Captain, the radar shows that there is a block under the surface of Mars 500 meters ahead.

Dozens of targets suddenly appeared on the radar screen at the same time.

It's not one piece. It's many pieces of metal. There are multiple sensing points on the radar. Qashqai stammered in the report.

500 meters?

Li Mo looked up, and it seemed to be a Martian rift zone 500 meters away.

He slowed down and slowly moved towards the rift valley.

This is a rift valley made of red Martian rocks. The width of the rift valley is not large, and the incision is flat and smooth, like a piece of tofu cut in half by a knife, which should be caused by the movement of the Martian plate.

How deep is this? Qashqai picked up a stone and threw it into the rift, and there was a sound of the stone falling to the ground.

Li Mo looked at the time. It took 10 seconds from the time the stone was thrown to the sound of the landing. Considering that the gravity and air resistance on Mars are relatively small, it shows that the depth of the rift valley is more than 1800 meters .

It's too narrow, and the Navigator can't go down. Qashqai looked at the width of the rift and shook his head.

Do you want to enter Baoshan and return empty-handed?

This is definitely not Li Mo's usual style. He turned back to the space excavator and adjusted the radar mode. The radar showed that the metal signal was only more than 500 meters away from the surface of Mars.

If the metal is man-made, there is likely to be a void 500 meters into the rift.

There is a way!

He picked up the communicator.

Call the Navigator!

Navigator received!

Please move forward to the coordinates A1278:F8982 area, we have a new discovery.

Half an hour later, the two astronauts hung Li Mo, who was bundled into rice dumplings, on the bucket of the space excavator. The other end of the rope was connected to a motor machine, and a simple human flesh crane was completed. .

Captain, are you sure you want to do this?

This is too dangerous!

Qashqai shouted to Li Mo who was hanging in the air.

Let's start! Li Mo closed his eyes, the spaceship couldn't go down, this was the only way.

Guan Weiqun manipulated the space excavator to move slowly, approaching the rift valley carefully, and stretched the bucket to the sky above the rift valley.

Perfect! Li Mo looked at the bottomless abyss under his feet, and gave Guan Weiqun a thumbs up.

Start releasing the rope!

With the rotation of the motor, Li Mo, who was hanging on the bucket, began to slowly descend.

Captain, if you feel unwell, please call the police immediately, and Wei Qun and I will pull you up immediately. Qashqai shouted while lying on the edge of the rift, holding the walkie-talkie.

Got it, please continue to release the rope.

The motor machine continues to rotate.

100 metres

200 meters

500 meters

With a gust of wind blowing, the rope began to sway from side to side, Qashqai nervously stared at the black spot in the rift, and Guan Weiqun kept pointing at the motor switch.

stop!

Crack! Guan Weiqun pressed the stop button.

I found a hole on the rock wall of the rift valley, and the excavator retracted its boom! Li Mo's voice came from the intercom.

The space excavator moved its boom slowly.

good!

stop!

At a distance of 512 meters from the surface of Mars, Li Mo, who was suspended in the air, took advantage of the swing of the big arm of the excavator to step onto a hollow with a light leap.

He untied the rope on his body and picked up the walkie-talkie: I have arrived at the target area, and you are waiting for the signal above.

Received! Guan Weiqun

Received! Captain, pay attention to safety. Qashqai.

The cavity was as tall as two people, and the rock walls were smooth, the product of obvious intelligence.

Li Mo suppressed the excitement in his heart and took out the tactical searchlight from his backpack.

In an instant, the light dispelled the darkness, and complex lines seemed to be engraved on the rock wall deep in the cave.

The searchlights approached.

It's petroglyphs!

On the rock wall, the simple and profound lines vividly form exquisite pictures.

Plants, plants, all kinds of plants!

Li Mo found that most of the petroglyphs were engraved with various plants, and the veins of the branches and leaves of these plants were clearly visible and lifelike.

With the gradual deepening, the volume of the plants on the petroglyphs is getting bigger and bigger.

Are there only plants on Mars?

So what species are these petroglyphs engraved on? He did not believe that plants had the ability to carve rocks.

wrong! It seems to have overlooked something.

Li Mo turned around in doubt, and returned to the first rock painting.

This petroglyph is engraved with a prokaryotic organism floating in an ocean-like liquid, and several lines on the mural express the presence of water.

In the second petroglyph that follows, prokaryotic cells in the fluid evolve into multicellular clusters.

In the fifth petroglyph, the engraved content has become a plant with rhizomes.

This is the evolution map of Martian organisms! Li Mo understood that what the petroglyphs describe is the entire process of the evolution of organisms from single-celled organisms to plants.

Smart plants?

With such doubts in mind, Li Mo continued to read with a tactical searchlight. In the following twelve petroglyphs, the main characters are still plants, but they are of more types and larger in size.

Until the thirteenth petroglyph, the plants disappeared, replaced by a circle with several lines drawn around the circle.

It's the sun!

Li Mo instantly remembered the stick figure he had drawn.

But why use a petroglyph to engrave the sun alone?

Could it be that there was no sun above Mars before?

This is impossible!

Li Mo immediately denied this ridiculous idea.

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