"But now that these are gone, why?" Some collectors have doubts about this.

The same clan responded, "Because the surface temperature of the planet drops, they all turn into ice, and the subsequent wind and sand bury it, these ice also sink into the ground." ”

"It may be because of the lack of mass of this planet, the small mass means that the temperature of the inner core cools faster, once the inner core of the planet is completely cooled, the planet's magnetic field can not be maintained, and the blue dwarf star is blown by the stellar wind that is many times stronger than the average star, and the original planetary atmosphere is naturally blown thin."

"Then the subsequent interstellar dust fell on the original ice, and the dusty surface environment was created today."

"Because of this dust environment, every time the planet reaches perihelion, the dust particles scattered in the atmosphere absorb more solar energy, and the air filled with dust particles will be hotter than the surrounding atmosphere, so it will rise rapidly, and the vacant places will be quickly filled by other air, and the dust storm will be formed."

The reason for the formation of the surface environment of the planet is not complicated, and the collectors of the more complex environment have seen it, especially the environment of the gas planet, which is harsh and chaotic, and the environment full of air currents is too difficult to find traces and derive, compared to the traceable environment of the terrestrial planet today, it is really better.

"In an environment like this, even if there are any buildings left behind in the civilization we are looking for, I am afraid that in 5,000 years, it will be completely destroyed by the sand and become a part of the dust."

Some individuals are very worried, and this concern comes from the possibility that the cluster will achieve nothing this time.

"It may also be buried by the wind and sand, but in short, you still have to look for it." Optimistic gatherers comfort their worried kindred.

As long as the man-made building can be buried by the wind and sand before it is eroded, then the possibility of being completely desertified will be very small, and the sand and dust of the buried building will play a good role in blocking the wind and deflecting the flow, which is equivalent to a protective layer of the ruins, which is why the relics and fossils often need to be excavated from the ground, because they cannot withstand the baptism of time on the ground.

With a network of rhizomes spread all over the world, it's easy to search for monuments underground, and collectors only need to hit the rhizomes and dig straight down.

In just a few days, a piece of life field information spread throughout the planet and was known to all the gatherers on the planet.

"There is a discovery! It's a man-made complex! ”

The found building was 3,000 kilometers above the ground, buried deeply, and was a composite structure made of ceramic bricks, sand, and metal strips, with a severely eroded surface and many fine sand particles.

"It's full of sand, so it's hard to explore."

The collectors who saw these knew that they had encountered a problem, the building was buried deeply, which meant a lot of pressure, and it was an old antique that had been desertified by the baptism of time, and if they rashly touched it, it would cause the building to collapse and be destroyed.

Therefore, there are individual proposals.

"I propose that the surrounding sand be solidified first, and then the sand inside the building will be cleaned to solidify the building itself."

"Agreed."

As proposed, the rhizome secretes a colloid, which adheres to the sand around the building, turning it into a hard protective layer that wraps around the outside of the building, resembling an egg, as it distributes pressure more easily.

The collectors then began to drive their own rhizomes, cleaning the sand from the building and solidifying the building itself so that it would not be damaged when it came into contact with the air.

The efficiency of working together with a large number of individuals was astonishing, and it didn't take long for the collectors to complete the solidification of the building and the exploration in general.

By building a physical model, collectors can intuitively see the ruins they survey within the channel. To read

"The structure of the place...... Well, most likely a fortress. ”

When each kind of building is designed, it will inevitably deviate due to its use, for example, the housing of ordinary residents is definitely different from that of a military fortress, which considers the occupants, and the fortress considers more resistance to attack.

Perhaps it is precisely because this complex is a fortress that it has survived the baptism of time and has survived until the gatherers have unearthed it.

"I think so, there are earthquake-proof and impact-proof designs in many places, and the skeleton of the building complex is also multi-stage in parallel, which is obviously to improve the design idea of external damage."

Some individuals agreed with the gatherers, agreeing that the ruins were a fortress, otherwise there would be no way to explain the structural design.

The exterior has been largely explored, and the collectors have explored the ruins deep into the interior, and after reaching a certain distance, some fossils of creatures have begun to appear.

"It's the bones, it should be the occupants and builders of this complex."

The gatherer was sure of his own judgment, because after searching around the building, there were only fossils of this kind of creature, and there were no fossils of other species, which meant that the owners of these fossils of creatures should be the intelligent species that originally lived in this fortress and built it.

Of course, there are other speculations, such as that the bones are invaders, and the builders of the fortress have fought with them and destroyed all of them, and then for some reason they have been evacuated en masse.

However, among all the speculations, the collectors still prefer the first one, that is, the owner of these fossils is the builder and occupant of the fortress.

"It's the first time I've seen this kind of creature with a brain growing in the body, and it doesn't have the biological structure of a skull."

The limbs are all similar, there is no neck, from the point of view of bone structure, the position that should be the neck is a mouth, the brain is inside the body, and then based on the position of the brain, the eyes have to be connected to the back.

But what makes collectors feel strange and curious is how the species realizes vision with such an eye design idea?

As for this issue, since it is not the main issue, they decided to discuss it later, first investigating the death sites of these intelligent species to find out the cause of their deaths.

"What was the cause of their death?" One person asked.

"Let me see, huh...... According to the various traces observed at the scene, it should have died from suffocation or penetrating rays, or viruses and poisonous gases. ”

These ideas were conceived because there were no wounds on the bones, meaning that unnatural death could only be done in a way that was very damaging to the body.

However, some individuals soon objected, as some of the objectors had found something around and within some of their bones.

"No, they died from some kind of weapon, don't look at their bones intact, but that's because the attack they encountered was so powerful that it just happened to kill them."

The weapon was a steel needle, about five centimeters long, that was found around and within the bones, some of which were inside the walls of the fortress.

"Steel Needle ......"

"Relying on this steel needle to pierce the brain, so as to achieve the purpose of killing, this is the first time I have seen this kind of weapon."

It was a massacre, a massacre of all sapient species within a fortress, whose enemies were trained and powerful special forces fighters, armed with a weapon that could fire steel needles and kill sapient species in the fort with a single blow.