"Start!"

An alien in military uniform descends the power switch, and the wind whistle of the impeller can be heard around it.

Strands of infrasound and ultrasound waves are released, and the sound waves spread deep underground at a speed of 3 kilometers per second.

However, that is the initial velocity, because the underground environment is complex and diverse, whether it is lava or various types of rock formations, the speed of sound waves will not be stable at 3,000 kilometers per second, so there will be a speed range that fluctuates up and down.

The aliens stared nervously at the display, waiting for the sound wave to respond with information.

The information was quickly fed back into the machine, and the picture of the underground was presented to Commander Allen and other powerful people in the colony.

It is a spider's web-like structure, running longitudinally through layers of strata from deep underground, and at the same time, there are many forks that together build a large and intricate underground world.

"Hey, is it really ......?"

Commander Allen first thought of what Marven said before, and immediately felt his scalp tingle, and immediately ordered.

"'Bang' ready!"

"No, Commander, wait a minute, something is wrong!"

It was Marven's assistant who drank Allen, if it was usual, with the guts of an assistant, he would naturally not be able to do this kind of thing, but now is not usual, and the assistant who is completely distracted can't take care of so much at all, and is in a calm and fanatical state.

The assistant urgently adjusts the parameters, and a larger picture of the underground is revealed, and at the bottom of the underground network is a large lava pool.

"This underground network is a hollow structure, and because the bottom is connected to lava, the air pressure and temperature accumulated in the underground pipes are very high."

"How tall?" Alan asked.

"I did a rough calculation, it's about 1400 degrees, there is a deviation, but it's not too big, this temperature is beyond the limit of carbon-based organisms, so it's ......"

"So we're safe?"

"It can be understood that way."

This answer made Alan and the others breathe a sigh of relief, except for some spider-web-like strata that looked strange, there was no expected monster threat, maybe it was because of this stratum structure that they were saved from the threat from the underground.

Alan thought for a moment and asked.

"How did this stratigraphic structure come to be?"

"Commander, this should be the lava channel of the volcano, when the underground pressure accumulates too much, the weak parts of the formation may be torn apart, forming a channel like this, and when the lava channel is close enough to the surface, it will form the volcanic eruption we know as well."

"I see."

Alan looked abrupt.

This is the end of the first underground detection of the aliens, but this is not the last, as the saying goes, if you are not afraid of 10,000, you are afraid of what if, and the underground is always a big undefended gap, what if there is such a 'what if' one day?

After that, the colony will conduct regular underground reconnaissance operations every five days and nights.

So, did Hogu's 'stealing' operation go bankrupt? The answer is no.

The rhizomes were gone, but those eyes were still in hidden places, and Hogu modified the design, so that the eyes could be fed by breathing, to obtain trace amounts of moisture in the atmosphere in combination with substances near the hidden range.

In fact, the aliens had previously thought to be lava passages, an intricate network of passages that Hogu deliberately left behind before he let the rhizomes evacuate.

First, it can mislead the aliens, as the so-called dark under the lamp, Hogu can use this psychology to better hide the 'eyes' in those colonies.

Second, these deliberately created channels are as predicted, because of the internal pressure and the bottom lava pool, the temperature will be very high, and this temperature will affect the surface, but the impact will not be very large, probably the surface temperature will be three percent higher than the original.

Aliens will not notice this change in temperature, but the 'eyes' will be affected, and this slight increase in temperature will not only not cause the air to dry out, but will increase the humidity of the air appropriately, creating a more suitable living environment for the 'eyes'.

The transmission of information is completely handed over to the life field for contact, and the concealment is far better than that of radio, and the only drawback is that there are too many relays, and the delay of information is very serious.

While monitoring the situation in the alien colony, Hogu established contact with the organisms in the starport wreckage, allowing them to search every corner of the wreckage, in order to find the location information of the alien's home planet.

Hogu knew how passive they were now, the enemy knew where they were, but they didn't know where they were, and they didn't even know when they were organizing a huge army.

I am in the light, and the enemy is in the dark!

Hogu is now basically determined that the enemy's home planet is in this planetary system, because with the analysis of the wreckage of the starport, the aliens' technological limit Hogu can basically deduce.

The science and technology of aliens is indeed a distance higher than that of human civilization on the earth, after all, they have been able to achieve large-scale deep space expeditions, and the earthlings are still sending satellites to the sky, and the research institutes of various countries living in the International Space Station are two or three kittens.

However, there still does not seem to be a qualitative breakthrough in their astronautics, at least they are still working fluids, and like Hogu, they use primitive chemical fuels as propellants.

In addition, Hogu did not find anything similar to a hibernation pod in the wreckage of Starport, and found excrement measured by tons in a certain cabin, and through the weight of the excrement, Hogu reversely deduced the number of individuals of the aliens, and then compared the living space to the conclusion that the aliens had not hibernated at all during the trip, and had been eating, drinking, and lazing throughout the journey.

The result of the reverse argument is that the aliens' ranges are very short, at least on a planetary scale.

But now the problem is that Hogu can't find the location of the enemy's home planet, and through the observation organisms in outer space, Hogu has successively identified seven planets that exist in the environment of the planetary system, but without exception, they are all desolate worlds without life.

Could it be that they are hiding?

Hogu could only think of this possibility, it had already launched a lifeform named 'Explorer' to the discovered planets, but due to the distance between the planets, it would take at least a few years to know what was going on.

During this time, what Huo Gu can do is to accumulate technology as much as possible, and on the basis of the current situation, complete a qualitative leap in the overall strength.

However, things are not always smooth sailing, and a message from a cosmic life form makes Hogu no longer calm.

"Will, there are a large number of individuals near the edge of the star."