The roots spread in a network under the planet, and the observation and exploration of the surface is secondary, and the expansion and spread are the main ones, because the two complement each other, expansion can make the search work twice as effective with half the effort, and the acquisition of material resources is also inseparable from the expansion of the rhizome, and the gatherers need to nurture the heavenly machine to calculate and decipher the language of the planet's natives.

It was precisely because of the main reason of expansion that the gatherers realized that they had made some new discoveries in the place that had already covered the ground and was more than forty kilometers away from the Shuntian Sect.

"Discover an unnatural structure."

"There is a cold weapon civilization on the planet, although the industrial technology is not good, but it already has the ability to build buildings, and unnatural buildings are common."

"Uh...... The information is brief, the technical level of this unnatural building is obviously not built by the indigenous civilization on the surface, they do not have such material science, and by the way, the atomic half-life of the outer wall has been measured, and the building has existed for 5,000 years. ”

The individual who responds in this way repeats the detailed explanation and delivers his or her own visual information.

In the visual information, the outline of a building can be vaguely seen on the vertical rock wall, this outline is only half of the outline, and the other half is buried in the rock layer of the rock wall, and there is no need to detect the atomic half-life, and the onlooker can see at a glance that the building is very old.

The silhouette is covered with red and yellow strips, and the main entrance of the building is covered with these things.

These strips are similar to paper, with the red part being the paper and the yellow part being the text on it, giving the viewer the impression that the paper is submerged in red dye and then writing words on it with gold ink.

The strips are so striking that the entire exposed building is covered in the rock face, and it's hard not to notice, so the collectors naturally turn their attention to it.

"Why is there something on the door of this building?"

"I know this thing, there is it on the side of the Seren, it seems to be called 'seal', you see, usually there are some words written on the seal, and there is also something on it."

Individuals soon demonstrated their understanding of the strips, and for good reason.

Other gatherer individuals recall in the genetic memories of the tribe to understand the concept of seals in the Seren civilization.

"Oh, I see."

"I've seen it for a long time."

Of course, there are some individuals who feel that it is useless information, so they do not recall, and ask their fellow people directly, only to understand the general concept.

"What is the purpose of the seal?" Subject asked.

The individual who came up with the idea replied, "On the side of the Seren, it is usually attached to the building that is about to be demolished, and because it is dangerous to tear it down, it is necessary to put a seal on it to serve as a reminder and warning. ”

"So this building is also going to be demolished? The local aborigines wanted to demolish the building. ”

"But among these seals, the longest one seems to have been around for hundreds of years, and the local aborigines planned to tear down this building plan for hundreds of years?"

Some individual collectors have questioned the fact that there are many items that appear to be seals, some of them are very new, like they were recently pasted, and some of them are very old, and after the atomic half-life has been measured, the longest existing strip was affixed about 400 years ago. Fire extinguished

This in itself is incredible, because in the atmospheric environment, it will be eroded by air currents, and even hard rocks will be weathered, even if part of the building will provide some cover, but it cannot achieve all-round protection, and it has continued to exist for up to four hundred years without falling off or corroding, which is enough to show that these suspected seals are abnormal, and the material technology of the local civilization has not reached this height.

However, due to preconceived notions, the collectors were more concerned about the demolition of the building, and then the whole thing was deviated.

"This situation seems to exist on the side of the Seren, called 'nail households'......"

"What is a nail household?"

"It is to describe some people who are fixed in place like reinforced parts called nails, and the demolition of buildings on the side of the Serens is usually to tear down the old buildings and rebuild new ones in their original locations, so that the people who originally lived there have to relocate, but there will always be some Serens who are unwilling to leave their places of residence for one reason or another, and these are the people that the nail households are talking about."

"This shows that although this is the remnant of a destroyed civilization, it is inhabited by indigenous people."

"The exploration still has to continue, don't make a big fuss when the roots are expanded, as long as it is not discovered, then it is no problem, if there is an accident, erase the indigenous individuals, and avoid the spread of our information to expand the influence."

"Agreed."

If there is a way to erase memories, collectors will be more inclined to use amnestics to erase the effect, after all, indigenous people are scientific research resources for enlightenment, although there are many natives, but collectors will not idle their own ethnic resources.

Unfortunately, the collectors have not yet had a detailed understanding of the brain structure of the planet's natives, and can only erase them until they know which part of the planet's native brain is the memory storage area.

Finding an inconspicuous corner of the ruins, the roots used chemical coordination to etch a passage for the roots to drill into and invade the interior of the building.

The ruins were dark and didn't look like they were inhabited, and they were crept around the corners.

After exploring for a long time, I didn't find any clues about the destroyed civilization, only found a suspected trace of a fight, these traces are very new compared to the building itself, it is left hundreds of years ago, the deeper you go, some dark blocks will gradually appear on the walls of the building passage, after extracting the composition analysis, the composition of these dark blocks is the same as the blood component of the local aborigines, from the residue of the traces, it should be splashed on the wall.

"It's not like an inhabited place, it's like a death arena."

"Attention, there's a voice."

After going some distance further, something could be faintly heard in the dark passages of the building.

"It seems that there are natives living here, so pay attention, don't make a big fuss and attract the attention of the natives."

"Understood."

If there is a sound, it means that there are indigenous people in the building, and the traces are all left hundreds of years ago, which does not mean that there are no indigenous people living now, even if the five fingers are not visible in the building, and the indigenous people who cannot observe objects through infrared wave frequency like the collector cannot see anything in the building at all, and no one can guarantee whether the occupant of the building is an indigenous person with quirks.

The exploration of the roots continues, and the collectors silently replace the roots with the same protective color as the walls, and add the slender volume to the visible spectrum, even under the illumination of the visible spectrum, it cannot be found without looking closely.

"Huh? Strange, why doesn't it feel like the sound is getting louder? ”

At first, the collectors didn't feel anything unusual, but as they went deeper, they were supposed to amplify the fuzzy sound due to the closer distance between them and the vocalizer, but this was not the case, the sound did not increase and remained blurred, and it seemed to keep a certain distance from the spreading roots of the collectors.