Nearly an hour later,

"The vertical height is already more than 1,000 meters, and the No. 1 UAV has been conducting reconnaissance for dozens of kilometers in total."

"This is an underground palace."

Yuan Chengjie looked at the data displayed by drone No. 1 and said.

"So, it's futile to go down blindly. It's like a maze down here. The speed of drones must be much faster than us, right?"

Yuan Chengjie nodded silently. Just as Captain Li said, if they had sent people down just now, they would have had to walk for a long time to reach the drone.

"Captain, look..." The soldier controlling the drone next to him interrupted the exchange between the two.

After UAV No. 1 descended through a vertical passage again, it came to a horizontal surface, and the alarm signal of the heat-sensing device next to it immediately lit up.

Captain Li looked at the heat signal sources, 4 of them!

"Found it!"

"Stop the drone!"

"yes!"

"Scan the entire horizontal plane!"

"Report, scanning failed, the space is too large, and it has exceeded the scanning range of the drone."

"Turn on the all-round surveillance screen and let the armed drones behind you support you!"

"yes!"

After a hurried conversation, the scene became quiet. Li Jing and Yuan Chengjie were both staring at the surveillance screen. They wanted to see where the other party came from.

There seems to be a faint light below, which is much brighter than the exploration section in the middle. They can roughly see the picture below through omnidirectional monitoring.

"The space here is obviously much larger. It should be their home. The glasses and the others are still a few hundred meters ahead. But, where does this bright light come from?"

Yuan Chengjie said first.

"I don't know, let the drone..."

After seeing several supporting drones in place, Li Jing wanted to let the drones continue to move forward, but after looking at the surveillance screen again, he was stunned.

Several "people" appeared in the surveillance screen.

The reason why this word is used is because the surveillance picture in front of Li Jing and the others did capture several people, which is different from the blurry picture of Yuan Chengjie checking the video.

This time the picture is quite clear.

White hair, pale face, eyes with small blue irises, and then a white upper body.

Taking a quick look, Yuan Chengjie instantly remembered that there is a kind of patient among the people on earth. Their appearance is somewhat similar to the "human" in front of him, that is, albinism.

It's just that the pupils of people with albinism are brownish-red or pink. This is because the iris parenchyma and pigment epithelium of albinos lack pigment cells.

"They" in the video also discovered the drone. Through the drone's surveillance probe, the two sides just looked at each other...

More and more "albino people" are gathering together, and they seem to be very interested in drones.

On the other side of the camera, Li Jing and Yuan Chengjie looked at each other, and Li Jing even had to order the operator to control the drone to raise its altitude.

To avoid being touched by them.

When the "albino people" saw the drones pulling up one after another, they all stretched out their hands and moved their lips up and down.

Judging from their expressions, they seemed very angry, with their teeth and claws bared, but unfortunately they couldn't reach the drone.

Otherwise, Li Jing would have prepared an armed drone to fire a warning shot.

The drone can transmit sound, but Li Jing and the others can't hear it. It's not that they can't hear their voices, but the audio coming out of the device is only intermittent, high-pitched or low-pitched noise.

It was like the radio was jammed, and a complete sentence could not be formed at all, but judging from their lips, it was obvious that they were talking about something.

This involves the problem of sound propagation on Pluto.

Like most planets in the solar system, Pluto also has a thin atmosphere, but humans cannot communicate here without the help of equipment.

Leaving aside the earth, humans may not be able to hear anything on alien planets, because human ears are limited in their perception of vibration frequencies.

The voice audio frequency for normal communication between people is 500-4000hz.

There is another situation, it doesn’t mean that you can’t hear the sound.

But if a normal sentence is said here, it will not be a sentence when it is heard by another person. It may be broken down into chaotic fragments like what Yuan Chengjie and the others are hearing now.

For example, Mars has more CO2. The unique properties of carbon dioxide molecules at low pressure make Mars the only terrestrial planetary atmosphere in the solar system that experiences sound speed changes in the middle of the audible broadband (20 Hz to 20,000 Hz).

At frequencies above 240 Hz, collisions of carbon dioxide molecules activate vibrational modes and have enough time to relax or return to their original state.

The result is that sound travels more than 10 meters/second faster at higher frequencies than at lower frequencies.

In layman's terms, on Mars, high-pitched sounds will reach the listener's ears faster than low-pitched sounds.

It's a mess, and it's a unique listening experience.

It's just that people can't communicate normally unless they evolve an auditory system that adapts to the environment...

Li Jing and the others could only listen to the people on the other side working in vain, completely unable to understand the other party's intentions.

Just when the two of them didn't know how to respond, the "albino" in the picture made a new move. They automatically stood in several rows, and then walked forward surrounded by several old men.

The old man looked at the drone first, then turned his head and said something.

Then, Yuan Chengjie saw the four people with glasses being helped to the front.

The four people in the picture are all alive, but they may have been confused by this group of "albino people" and are a little at a loss.

Not to mention these four people, Li Jing and the others were also confused. They couldn't figure out what the other party meant.

At this moment, a communications soldier ran over.

"Captain, General Chu's phone number in the command center."

Li Jing quickly stood up, walked out, said a few words to Chu Ge, then cut off the communication and returned to Yuan Chengjie.

"General Chu ordered us to stay where we are, he will be here soon!"

Yuan Chengjie immediately felt relieved. Chu Ge was their military god. He must have had a countermeasure when he came in person...

The scenes Chu Ge saw in the command center were synchronized with those of Yuan Chengjie and the others. www.bǐqυgetν.℃ǒm

At this moment, there was not much confusion in his heart, because he had already understood what those people meant.

Although it was a bit difficult and even required the assistance of lip reading, he still understood it.

He now concluded that the language of this group of people came from the same language system as the group of people in the dream.

This shows that they were indeed "experimental subjects" of previously fallen advanced civilizations.

The two languages ​​belong to the same family, but there are slight differences. Chu Ge guessed that the difference is between the maternal line and the collateral line.

The latter should be a natural evolution of the planet's environment or historical evolution.

These are not the important points. The important point is that he just heard a word from the mouths of those "albino people": Creator!

It was when Chu Ge heard this word that he decided to come in person, because he had already found the entry point.
Chapter completed!