The winds in the area seemed to be starting to weaken, and when Luo Xu returned to Base 17 after a day's work, he saw that the video footage showed that the level 8 gale there had weakened to about level 5, which was not much of an impact on the robots working there.

Luo Xu's gaze turned from the steep ridge and the dry valley to the sky, the dense clouds still shrouded the sky, without a trace of receding, in the entire line of sight, the vast world of inhabited people was filled with endless cold and gloom, like a cold deep valley hell, without a trace of life.

Looking up, a set of data came over, and after being tested by the air microbial detector, no bacteria, fungi, bacteriophages or bacterial spores were detected in the air, and the microorganisms contained in the air were zero. Luo Xu is not surprised, in the Antarctic or Arctic regions of the earth, the microbial content in the air is almost zero, not to mention whether the life form is the same as the earth, even if it is similar to the earth, it is normal that there are no microorganisms in the air of this cold hell.

In addition to the amazing oxygen content of the air of this strange planet, the rest of the air also has a few non-toxic gases such as nitrogen and carbon dioxide, so it stands to reason that such pure air seems to be breathable by humans, but too high oxygen content will accelerate the aging of various organs of the human body, resulting in chronic oxygen poisoning, so it is still not suitable for human beings to survive for a long time.

Judging from the experiments done by the air collected from the strange planet, the current life index of the five groups of young mice is normal, and no signs of death have been found, but Luo Xu knows that the time is too short, and the second is that the oxygen content is not high enough to be unacceptable, if the content is about 80%, it will cause damage to the lungs of the young mice in a short period of time and cause death.

Luo Xu thought about it, in fact, this content of oxygen is not unacceptable, at least with some simple treatment, it can make the human body breathe, from this point of view, maybe this is a planet suitable for human survival.

"Ahem......"

Luo Xu clenched his fists and coughed, what does it matter to him whether it is suitable for human survival, the most important thing now is to investigate the situation of the unknown extraterrestrial building.

"I wonder if there will be extraterrestrial life there? If so, how do I deal with it? ”

Luo Xu's mind was a little confused, he had never been in contact with such a thing, of course he would be confused for a short time, at first he was excited and a little hesitant at the same time, although it was very good to meet an extraterrestrial life, but what if this extraterrestrial life was not friendly? From the observation of the structure of the "pyramid", it can be seen that the difficulty of building this thing is definitely not simple, and it is difficult for human beings to do it now, which shows that the technological level of this extraterrestrial life is not only not inferior to that of the earth, but also a step higher, which is what makes Luo Xu feel embarrassed.

In the end, curiosity about the unknown overpowered hesitant thoughts, and Luo Xu decided to continue to explore.

In the 24-hour distant observation records, the unidentified extraterrestrial structures are always in a "quiet" state, and there are no "creatures" coming out or "creatures" entering, and in the enlarged picture, there are even many broken cracks on the surface of the extraterrestrial buildings, and some cracks are more than 100 meters long on the hard black-gray stone walls. This observation made Luo Xu wonder, because this phenomenon gave him a very familiar feeling, that is, the abandonment of ancient buildings.

In any case, on-site observation and exploration can get more information, so under Luo Xu's instructions, a K200 carrying instruments and a K500 set off, aiming directly at unidentified buildings outside the ground.

The gravity here is about 1.1 times that of the earth, and there is almost no difference, and the two four-wing rotor drones exceeded the K200, quickly flew seven or eight meters above the ground, and came to the turn of the canyon before the K200.

Through the bend of the canyon, the magnificent pyramid appeared in the camera again, and the rotary-wing drone slowed down sharply, reduced its height to half a meter, and flew cautiously towards the pyramid, keeping an eye on the surrounding situation along the way, and retreating immediately if something went wrong. Fortunately, everything was normal, nothing unusual happened after a few kilometers of travel, and the rotary-wing drone arrived at the foot of the pyramid safely and smoothly.

Looking closer, you can see more clearly from the video that the surface composition of the pyramid is a black-gray and lustrous rock, and the preliminary detection is that the silica component is the main body. The two gyrocopters flew separately and swept along the feet of the unidentified structure to the sides, intending to observe if there was an entrance or exit to the building.

The speed of the two gyroplanes was so fast that by the time the K200 came to the foot of the pyramid, the gyrocopter had already bypassed the base of the building on one side and began to inspect the building base on the other side.

The K200 carries more than sufficient instruments to quickly detect the rocks on the surface of the pyramid, which are composed of minerals such as silica and corundum, which is a mixed mineral, and after the isotope inspection, the molding age is judged to be about 100,000 years.

"100,000 years?"

Luo Xu's hand shook, and cold sweat almost flowed out, which means that the history of this building is 100,000 years? This is really remarkable, the historical record of mankind is only about 5,000 years, compared with 100,000 years, it is really not worth mentioning. Wiping a cold sweat, Luo Xu calmed down, the ancient ruins on Mars that he had not yet entered had a history of more than 50 million years, and he was not even qualified to be a son for 100,000 years. However, the ruins of Mars are really just ruins, and inside this unknown building, there may be extraterrestrial intelligent life!

"Ding!"

The warning sounded, Luo Xu turned his head to look, it turned out to be a gyroplane flying on the right, and found a place that was suspected to be an entrance.

Well, this entrance is said to be the entrance, it is more accurate to say that it is a crack, from top to bottom more than fifty meters of cracks on the stone wall of the ground base, collapsed an irregularly shaped gap, the highest point is seven meters, the widest point is four meters two, so that the gyrocopter or K200 can easily enter inside.

The gyrocopter scanned the surroundings and continued to fly along the base of the pyramid until the two rotorcraft met after a week, and did not find any more gaps, so they had to return to the first gap. After receiving the order, the K200 also slowly came to the gap in the base and successfully joined the rotorcraft.

"You should be able to go in and have a look, right?"

Luo Xu had a bad feeling, if the extraterrestrial intelligent life was really inside, how could he think that the building would not be full of cracks and a big gap, right?

"Is this another relic?"

100,000 years is an unbearable number not only for human beings, but also for any living being, Luo Xu sighed, he couldn't tell whether he was happy or disappointed, being able to contact extraterrestrial life was very happy and interested in him, a person who was willing to explore, but the other side of the bold surname was cautious but told him that easy contact with unknown extraterrestrial creatures was a very dangerous move in terms of probability. This ambivalence makes him feel very uncomfortable, like seeing his favorite toy in front of him and his parents not buying it for him.

"Forget it, seeing is believing, Bob, let's let the drone in first!"

Bob, who received the order, instantly sent the command remote control to the drone, and the two rotary-wing drones did not hesitate and immediately flew in, leaving the K200 alone outside.

After entering, it was pitch black, K200 In order to facilitate Luo Xu's observation, the searchlight on the plane was turned on, forming two pillars of light that pierced the darkness and swept back and forth, transmitting the surrounding scene back to the big screen in front of Luo Xu for the first time. The first thing that comes into view is a corridor about ten meters wide, parallel to the outer base wall, extending infinitely to the left and right, disappearing into the thick darkness.

"Hey, Bob, get the gyrocopter a little closer to the wall."

Luo Xu let out a "huh", as if there was a trace on the wall just now.

The gyrocopter immediately complied with the order, the searchlight turned to the direction of the wall, and the camera on the drone clearly recorded all the scenes, and it turned out that Luo Xu was not mistaken, the walls of the corridor were indeed imprinted, which were full of strange patterns, and according to the symmetrical structure, the same pattern marks were formed up and down, left and right.

A flash of light passed, and the high-definition photo taken by the camera was transmitted back to the base, Luo Xu's finger was on the screen, and the high-definition photo immediately expanded, and the patterns on the wall were clearly presented in Luo Xu's eyes.

"What do these patterns mean?"

Touching the back of his head, although the pattern is very beautiful, but after all, the meaning is unknown, and Luo Xu didn't expect to be able to see any clues from it, so he gave up after a few looks.

"It's strange, according to the level of technology required to build this building, shouldn't it be like this?"

It's like a modern building, but the decoration is as unreasonable as the original appearance.

"Hey, you can't think like that, using the thinking of earthlings to speculate on life on alien planets is itself an unreasonable behavior."

Luo Xu shook his head slightly, denying his speculation.

Since there is a long corridor inside, divided into left and right sides, it is just enough for the two gyroplanes to explore separately, and the gyrocopters are separated and rushed into the thick darkness in their respective directions. The corridor passage is very straight, if it is judged parallel to the base, the length of the corridor should fluctuate in the range of 1500 meters, Luo Xu deliberately asked the rotorcraft to fly at a reduced speed, so as to carefully observe the surrounding situation, and record all the scenes, and at the same time build a three-dimensional map.

All the way according to the plan, the gyroplane slowly flew inside this dark passage, Luo Xu looked at the time, almost ten minutes had passed, and no objects or clues had been found.

"Well, it's the end?"

In the video from the gyrocopter flying to the left, a sealed stone wall blocks the way.

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