Chapter 1,274 Ultrasonic Fence

As early as last month, the colony's frontline research institute and the laboratory in Halo City finally found a suitable frequency through joint research.

Through the magically modified seismic wave excitation device, twelve seismic waves of different frequencies are continuously emitted underground, and a "black area" can be created within a range of more than ten kilometers underground. In this black area, the devil bug cannot correctly judge the direction, nor can it judge the surrounding and surface conditions, and it will also cause strong physical discomfort.

Experts from various countries in the laboratory call it ultrasonic fence.

Twelve seismic wave excitation devices were deployed around the colony, using ultrasonic waves to surround the entire colony into a twelve-sided isolation wall. Now, with the colony as the center and a radius of more than ten kilometers, it has become a restricted area for devil insects.

Thanks to this, the colonial development work that had been stalled for a long time can finally be restarted.

Under the command of Captain Hong Zewei, the colonial engineering team repaired the hydroponic plantations and pastures that were riddled with holes caused by devil insects. At the same time, in accordance with the plan of the Space Command Center, the first highly automated steel factory was established on Mars.

Mining iron ore on Mars would not require mining shafts at all.

Mars is full of iron ore.

This sentence is not false at all.

Picking up a handful of sand from the ground, you can smell the rust.

The raw materials for production are right under your feet. The newly built iron ore plant only needs to shovel truckloads of sand into the boiler to produce batches of finished steel. Most of the smelted slag is silica, which can be used as glass and concrete building materials with a little processing.

Part of the steel produced was used in the construction of the colony, while the other part was made into rebar and stainless steel plates to strengthen the surface of the colony.

Yes, the steel on Mars is so cheap that it can be used as floor tiles to pave roads.

The engineering team responsible for the construction will first drive the steel bars into the ground, then fill them with cement, pour them into a concrete foundation, and then lay a layer of high-strength stainless steel on the concrete floor. In this way, even if a drill bit grows out of the head of those devil bugs, they will not be able to drill through the floor of the colony.

Although there is an infrasonic fence, most people still feel uncomfortable thinking about the tunnels dug by devil bugs under their feet. Even if it is just in case, this alloy floor is absolutely necessary.

In addition, concrete has a strong sound insulation effect.

It can effectively confine ultrasonic waves underground, which is also beneficial to the health of colonists in the colony.

In addition to iron ore, Wang Qiang's geological team recently discovered a carbon mine with considerable reserves in a crater ten kilometers away from the colony. This kind of pure natural carbon mineral is rare on Earth in an oxidizing environment, but it seems to be very common on Mars.

Relying on the graphite produced by this carbon mine, the colony can now produce graphene independently without relying on imports from Halo City.

The steel plant and the graphene factory have been built, and now there are only two tasks left for the colony from the headquarters. One is to build a ground base station for the space elevator on the equator, and the other is the 071 project.

Now, the Halo Marines have established an operations base above Mine Point 071. The colonial construction team reinforced the road with concrete and steel. At the same time, they also established machine gun towers, communication base stations, accommodation barracks, garages and other facilities.

In addition, the engineering team's drilling rig has already drilled a tunnel around the 071 mine point that can be passed by infantry fighting vehicles, and the walls of the tunnel have been reinforced with reinforced concrete to prevent damage by devil insects.

Drilling the tunnel into five kilometers or even deeper strata is undoubtedly a test for the construction skills of the colonial engineering team. However, they had experienced this test many times. After more than a month of hard work, the drill finally reached the edge of the ruins of Gaia civilization five kilometers below.

What they have to do next is to continue drilling down around the ruins and drill out a spiral passage. After determining the level of the Gaia civilization database, dig into the ruins.

"This is Team A, we have reached the edge of the unknown area."

Following behind the drilling vehicle and looking at the map on the holographic screen inside the helmet, Zhang Hai reported the current situation to the command headquarters.

"move forward."

"Received." After ending the communication with the headquarters, Zhang Hai switched the communication to the team channel, set up the rifle in his hand, and pointed it at the channel ahead, "Attention all combat units, high-density life signals have been detected ahead. We're about to enter the danger zone. Protect the rig, flip the safety on, fire free, and move."

The drilling vehicle continued to advance, and the engineering vehicle behind it drove the rebar into both sides and welded them together, while pouring quick-drying concrete to reinforce the tunnel. The Marines followed closely behind, holding the Gauss rifle in their hands and carefully monitoring the front.

If the devil bug is likely to attack from a certain direction, it must be directly in front of the drilling rig.

When the drill bit broke through a rock wall, the rock in front collapsed, exposing a large space. The drill truck stopped, and the soldiers on both sides immediately stepped forward, but no trace of the devil bug was found in this hollow layer.

Zhang Hai walked to the nearby rock wall, turned on his tactical flashlight and checked along the wall, and found the flesh-red rock and the clusters of bacteria growing on the surface of the rock.

There is no doubt that this is the oxygen supply layer.

After signaling to the soldiers behind him, Zhang Hai and his men carefully retreated into the reinforced tunnel. Just then, a soldier accidentally discovered a strange egg follicle.

The dark green follicles appear to be about half the height of a person, and a thin layer of colorful oil spots can be seen on the shiny membrane under the illumination of a flashlight. According to some unknown rhythm, the follicles contracted and expanded slightly.

I don't know if it was because the light of the flashlight stimulated it, but its beating speed accelerated slightly.

"What is this?" Pointing the rifle in his hand at the insect egg, the soldier reached out and pressed it on his helmet, took a few photos and sent them to the team channel, "Report to the captain, there is a situation here."

"Devil insect eggs?" Looking at the image on the holographic screen, Zhang Hai frowned slightly and walked forward with the rifle in hand, "No...stop the drilling rig."

The drilling rig stopped drilling forward.

Soon, Zhang Hai regained contact with the headquarters.

As soon as the communication was connected, the headquarters asked.

"What happened? Why did the drilling truck stop?"

"Report to the headquarters, this is Team A. We drilled through a hollow formation and found a large number of oxygen-generating fungi and a strange kind of insect eggs...probably insect eggs." Looking at the stirring star Follicle, Zhang Hai sent those photos to the expedition headquarters.

"This is the command headquarters. We have received it and are sending researchers to the target area to take samples. Please wait here for a moment."

"Copy that." After hanging up the communication, Zhang Hai gestured to the soldiers behind him and pointed to both sides of the drilling vehicle.

Before the researchers arrive, they will set up a simple defense line here.

"What do you think this thing could be?" Koenig whispered in the communication channel while nervously aiming at the insect egg.

"I don't know, maybe it's a mutated devil bug? Maybe it's a new species that we've never seen before? To be honest... I've even seen that kind of thing. Even if God stood in front of me, I wouldn't know it. It feels weird.”

Listening to the chatter of his teammates in the communication channel, Zhang Hai looked at the insect egg.

I saw that the insect egg was like a living heart, beating according to a special rhythm.

I don't know why, but looking at the insect egg, he couldn't help but feel a strong uneasiness in his heart...