An hour later, Robin defied everyone's objections, and resolutely led Zolo, Leona, Lee, and several messengers and surveyors into the abyss, intending to use this most primitive artificial tracking method to find the Insats hidden underground and the army of creatures they raised.

Compared with the search that relies solely on scientific and technological means, the original search method of artificial tracking like Zhuo Luo has too many uncertainties, and the success or failure depends entirely on the tracker's own experience, and the search area is relatively narrow, after all, the range that a search team of only a dozen people can radiate is absolutely impossible to complete a large-scale search mission in a short period of time like satellite detection or sonar equipment. However, although human tracking has such and such disadvantages, it is not completely without any advantages over pure technological means of searching.

First of all, the squad-based exploration team has a strong stealth xìng, which is the main reason for the low success rate of tech searches. Moreover, when conducting a field search in person, experienced field tracking experts can spot the enemy's tracks through some very subtle and undetectable traces. This is also not possible with scientific and technological searches, after all, in large-scale sonar detection, explorers can only get results through sonar feedback, so unless the target is directly found, otherwise, like the scratches left on the ground by biological action...

Traces, excrement, and subtle man-made damage to the environment can all be overlooked. And these clues are important information that leads human beings to directly discover the target.

It was for these reasons that Robin agreed without hesitation when Zolo proposed human exploration.

And Robin also knows the reason for everyone's opposition. After all, the combat effectiveness of the exploration team in small teams is too weak, and the exploration area may directly penetrate into the core of the enemy-occupied area.

From the standpoint of the subjects of the Empire, it is simply not acceptable for the Emperor to go to such a dangerous situation in person. However, if you want the weak combat unit of the squad to have a certain amount of extreme combat effectiveness and be able to retreat in a dangerous combat environment deep into the core of the enemy's theater, there must be a Saint-rank powerhouse in the squad. And for now, the only person who meets this condition is Emperor Robin.

As a husband and a friend, Robin absolutely can't accept that he can only watch his imperial concubine, the mother of his children, and his deacons go deep into the mirror, while he has great power and can only stand in the safest place from afar because of his identity as the emperor.

Therefore, even if his decision was a bit reckless, he stubbornly rejected everyone's opposition, and resolutely led this team of more than a dozen people down the steep vertical cliff to go deep into the hellish abyss.

More than ten minutes later, Robin and his party, equipped with heavy infantry armor and carrying a large amount of equipment, gradually entered the bottom of the crack in the earth's crust with a depth of more than 1,700 meters with the help of Gu climbing tools.

Hayden is not a high-quality planet with a superior ecological environment and vigorous life like Earth, but it is by no means a death star like Venus and Mercury that is not suitable for the survival of any living thing. In terms of the development of the planet, Hayden is currently in the early stages of life. Due to the limited conditions of the planet itself, there is no large area of ocean on the surface of the planet like the earth, and the thin atmosphere and active crustal changes show that the rocky planet has not yet reached a completely stable state, but the accumulation of time in the second year has allowed the planet Hayden to begin to have the basic conditions for life, among which, the most important point is that the planet Hayden has a huge underground water vein. Relying on the cracks in the earth's crust that reach a depth of nearly two thousand meters and the dense quartz stone forest, the underground water vein system of Hayden Planet is particularly developed, which allowed Robin to witness countless dense honeycomb-like caves on the cliffs on both sides of the cliff as he descended all the way down. Some of the caves even have large amounts of groundwater gushing out like waterfalls, indicating that these caves are connected to the underlying water vein system, like a spider web, building a vast underground world under the surface layer of the Kanas Mountains.

"If you go down the valley, you will be at the bottom of the valley, and the detection data will feed back, and below us is an underground river with a depth of more than 300 meters."

When the exploration team dived to a depth of more than 1,300 meters, the accompanying explorers informed Robin of this data, saying that there was no need to go deeper.

"Zhuo Luo, what do you think?" Robin turned his head to look at Zolo, who needed to seek advice from Zolo, an expert in field tracking.

"Let's find a cave and take a look, maybe we can find something."

In the darkness of his fingers, Zhuoluo, who was climbing on the cliff like a gecko, approached the nearest cave with the help of night vision goggles. Robin and the others followed, stepping into this strange cave filled with countless fang-like stone bells.

"Sizzle! ~" Walking into the cave with a sniper rifle on his back, Li's cold hairs stood on end for no reason, and he couldn't help but gasp and said: "This place really makes me creepy, I have a hunch that we may really find something this time." "All of us here are veterans of the battlefield, and we all have a unique indescribable sensitivity to danger. In terms of current science, it is not yet possible to explain how this kind of premonition similar to the sixth sense is formed, but in reality, this premonition is particularly important for soldiers, many times, a subconscious prediction can save a life, so on the real battlefield, soldiers who are on the front line of the battlefield often believe in their own feelings, rather than auxiliary equipment such as electronic instruments.

"Indeed, I feel the same way." Robin unloaded the assault rifle from his shoulder and expertly inspected all of his combat equipment.

When Robin and Lee were facing each other, the explorers in the entourage began to take out the equipment and set up sonar devices in various parts of the cave in order to detect the depth of the cave and where it leads. Like a hunter, Zhuo Luo carefully observed the stone bells around him, observing every trace of them, hoping to find something. Lì Ona took out the biological testing equipment to test the water samples of the slow-flowing groundwater in the cave, as well as the water attached to the surface of the stone bell.

Suddenly, Zhuo Luo stopped in front of a relatively narrow rock wall, and after careful thinking for a while, his eyes suddenly lit up: "Robin, there seem to be some traces of crustacean activity here. Robin walked over quickly, and sure enough, he saw several conspicuous scratches on the large protrusion of the stone bell under the rock wall. marks, and in terms of the depth of the scratch and its roughness, it should be a recent mark.

"The water quality here is very high in microorganisms, thousands of times more than the groundwater taken from previous samples. I think that this water must contain the body fluids left behind by various organisms to cause this result. Lì Ona came to a conclusion from the perspective of a biologist.

"So everyone's answer is the same," Robin's face showed excitement, and he turned back to the explorers who were debugging the sonar equipment and asked, "Has the terrain structure in the cave been detected?" ”

"At present, the exploration progress is 17 percent, and the terrain here is very complex, with countless forks in the road like the Mí Palace, and it may take 40 to 50 minutes to fully detect the terrain structure of the entire area."

"We can follow these tracks first, and they will leave one and they will leave a second." Zhuo Luo pointed to the sonar equipment that had already been set up: "Put these devices ... [This chapter is not finished, please click on the next page to continue reading!] ］