Mars colony.
Near Mine 071.
Near the long-abandoned mine, there were a few tire marks left.
Two armored vehicles and a heavy engineering vehicle stopped next to the sand dune about one hundred meters away from the mine. The overturned rover was not far away, and the chassis armor still had traces of Devil Worms gnawing on it.
Zhang Hai looked out the window, then reached out and pressed on his helmet to get in touch with the coordinator on TS Expedition.
"… has arrived at the target area, requesting airstrike support."
"This is TS Expedition. The airstrike request has been approved. Please place the airstrike beacon within thirty seconds."
"Roger that."
Soon, the top cover of an armored vehicle opened, and a soldier poked out half of his body. He took out a flare gun from his waist and pulled the trigger at the sand dune on the other side.
The red beacon plunged into the sand dune and transmitted coordinates to the missile that was falling from the synchronous orbit.
Soon, a black dot gradually appeared in the sky, dragging a long flame tail.
Before the black dot became clear, the soldier got back into the armored vehicle and closed the top cover.
"Boom!"
The tremor of the impact came from the bottom of the vehicle.
The whistling gravel blew tens of meters away and covered the entire convoy with a thick layer of sand.
Soon, another muffled sound came from an unknown depth underground.
The explosion of flames engulfed all the tunnels and completely suppressed the area.
The convoy continued to move forward for more than ten meters.
The engineering vehicle stopped first, and the staff inside operated the robotic arm to take out a four-meter-long pyramid from behind and threw it on the sand. Two armored vehicles protected it in the middle, and the electromagnetic pulse cannon on the top carefully guarded against possible threats.
Their mission today was simple.
There were four pyramids in total. They just needed to push them all into the ground, and then they could return.
"Are you sure this thing really works?" Sitting in the armored vehicle, Zhang Hai looked through the scope and saw the mechanical arm of the engineering vehicle pushing the pyramid bit by bit into the ground. He couldn't help but ask.
"In theory, it's useful."
Sitting across from the Marine Corps Captain, Wang Qiang looked at the tablet in his hand, browsed the data on the screen, and responded casually, "They are like bats at night, and what we have to do is to get a few high-decibel speakers, bury them in the ground, and continuously transmit 'noise' to the ground ten kilometers below 24 hours a day. If I were those bugs, I would definitely not want to stay here. "
The latest task of the frontline researchers from the Celestial City Research Institute was to find this frequency through repeated experiments.
This pyramid was originally used to map the geological information of the mantle. After several researchers' magical modifications, it had completely turned into a seismic wave transmitter used to create different frequencies of "noise".
The nuclear fusion battery built into the "pyramid" could keep it working until next year. After a while, he would throw a life signal detector into Mine 071, and he would know what frequency of noise the Devil Worms in the vicinity reacted the most to, so they would turn around and run when they heard it …
In addition, in order to prevent the bugs from biting it, the engineering vehicle would have to insert a few steel bars.
"It's that simple?" The Marine Corps soldier sitting next to Zhang Hai asked with some uncertainty.
He was a newcomer named Koenig, an immigrant from Italy with the rank of corporal. He served as the assault soldier in the team, replacing the injured Sergeant Miller.
When they were on the SS Expedition, they simulated combat with Devil Worms through the training program in the Phantom helmet. In the simulation training, they were taught that any contact with the ground was fatal.
"It's that simple." Wang Qiang responded emotionlessly, his fingers tapping on the tablet, and then he looked at Zhang Hai. "Can you please get closer over there? There may be solar wind outside, and the signal here is very poor. "
"No problem."
Zhang Hai pressed his hand on the helmet, then he ordered the soldier in charge of driving. Soon, the armored vehicle drove to the side of the engineering vehicle.
The four-meter-long pyramid was completely submerged in the desert, leaving only a platform less than a foot high on the surface. In order to prevent this thing from being buried under the sand, the engineering vehicle also inserted a Xin flag above the platform as a mark.
"Is it done?"
Zhang Hai looked at the engineering vehicle that put away the robotic arm, then he looked at Wang Qiang.
"One is not enough, we need about four." Wang Qiang set the parameters on the tablet and then pressed the start button. "Surround Mine 071 into a square, then launch the shock wave at the same time, and we'll collect the data."
"Does this thing really work? Are you sure? I don't feel any change at all. "Koenig was skeptical.
"Because it emits ultrasonic waves, and you're standing on the back of the shock wave, the impact on you is at most half a beat faster." Wang Qiang grinned and put away the tablet. "If you stand directly under it, you'll feel what it means to be better off dead."
…
Future Building Basement First Floor.
After he got off the elevator, he followed Dr. Amos and walked side by side in the corridor to the lab.
"After you passed out that day, I lost connection with the drone. At first, I thought the drone was broken, but then I thought about it carefully, and the more I thought about it, the more I felt something was wrong. If the memory of the Gaia civilization is using our drone as a springboard to communicate with you, who is directly connected to the drone, it doesn't make sense to destroy the entire drone. "
"So?" Jiang Chen asked.
"So, I guess, did the Gaia civilization use some special means to make a small modification to the communication frequency of our drone's communication chip? After all, our research on Klein particles is still a toddler, but they are quite mature. If you want to plug the USB into a 94 year old computer, you must make a conversion port or simply upgrade the hardware. "
Dr. Amos took out the ID card from his pocket, swiped it on the door, and made an inviting gesture. "Sure enough, it took me more than a month to find this frequency … To be honest, I almost gave up."
Amos walked to the computer, clicked a few times on the touchpad, opened the holographic screen, and displayed a PowerPoint in front of Jiang Chen.
"This is?" Jiang Chen frowned.
"Another memory, but the one I found is a bit different from the one you encountered," Amos shrugged. Amos shrugged. "It's very short. If you're looking at a history of the world, then it's just a diary, or a memoir or something like that. After I read it, I made it into a slide based on my impression. "
"A diary?" Jiang Chen looked at the image on the holographic screen and asked, "Whose diary?"
"The last one, Gaia." After a pause, Amos continued, "The one who died of old age in that ruin."
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