WIT soon manipulated Europa's dense surface robots and began to build a base for the aseptic manufacturing of the deep submersible.

The raw materials carried by the Titan are all running a deficit, which also reminds Ruan Lin that he must replenish the raw materials needed for various types of equipment as soon as possible.

Ruan Lin walked to the 40 ice-drilling robots, which formed a circle and chiseled through the 25-kilometer-thick ice together! In a circular area with a radius of 9 m, a small visible surface ocean was created.

Depending on the environment, they stand at an upright height of 26 kilometers, and at the moment Ruan Lin can only see 1 kilometer of them exposed on the surface. They are like needles that fix the sea, embedded in the thick ice.

Looking at the small ocean with a circular surface with a radius of 9 meters, Ruan Lin recalled the picture of traveling alone on the earth.

When the sun's light faded, the moon's moonlight spilled onto the surface of the sea, forming a reflection in the center of the sea. I sat alone on the shore, and the waves crashed against the sand. At this time, there is only the uninterrupted sound of the waves. You can look at the endless sea and start reminiscing about the past.

The moon is born on the sea, and the end of the world is at this time.

Unfortunately, there is no such poetic feeling here. The earth and the moon no longer exist, where are the friends who look at the same bright moon as me?

This is not a gentle country of its own, and the large snowflakes that come to your face are the most real feedback.

Ruan Lin got closer to the small ocean on the surface, stretched out his finger to touch the seawater, and then put it into the mouth of this body, although this body didn't feel any taste, he still said: "This sea water is really salty!" ”

Ruan Lin returned to the Titan in a lonely state, and then returned to consciousness to the computer.

He switches between the perspectives of different robots, as if trying to let the endless hustle and bustle dilute his feelings as a human.

After 27 days, the robot worked day and night to assemble. The submarine was finally completed.

It is equipped with thousands of lithium batteries, arranged in several groups. It is also equipped with 8 pieces of ballast iron so that it can successfully float. The exterior of the submersible is also made up of thousands of nanometer-sized glass beads, which is the last line of insurance to keep it safely afloat. The surface is equipped with three mechanical samplers and a sampling basket. Its cabin is very cramped, with only a few real-time video transmission devices housed. Due to the large number of batteries carried, its total weight reached 50 tons.

Ruan Lin looked at the submarine from the perspective of the robot, and said in his consciousness: "It's called the Dawn!" It bears the dawn of the desire of all mankind to prove that they are not alone in the solar system. ”

"WIT, start the overall transfer, do the first test dive."

"Okay, I've dispatched the crane to start the transfer. The first test dive is about to begin. ”

"Ready to start playing live video, I'm about to shift my consciousness to the mechanical body."

Ruan Lin was a little worried about this experimental dive, the first time it was inevitable that there would be mistakes, and if it could be successful once, it would be the best result.

Ruan Lin's consciousness returned to his mechanical body and walked to the main control room.

Ruan Lin raised his head: "Wit, turn on the central screen." ”

The screen began to unfold slowly, and the first experimental dive gradually began.

The transfer of the Aurora used a large crane, which was originally intended to be used to transfer the Titan civilization, but the first time it was used to transfer a deep submersible.

The crane placed the Aurora on the surface of the ocean. Its volume occupies half of the radius of this circular opening.

Next, Aurora began to dive into the water, and its figure gradually disappeared from the surface.

From the real-time footage inside it, there is still a faint blue light around it, but because Europa receives less sunlight, it does not appear to have the sapphire light of the Earth's ocean.

The data on the screen shows that the depth of the dive has reached 26 meters. This time, Ruan Lin set a test dive target of 100 meters.

As you continue to dive, it starts to get dark. Aurora turned on its front lights.

70 meters. It was still endless darkness, and no life was found. If this is the Earth's ocean, there are already a lot of marine fish at the depth at this moment.

100 meters, the surrounding scene still hasn't changed.

Ruan Lin was a little disappointed: "Okay, the test dive was successful." wit, let it float up, and then check if there are any parts that are wrong. ”

Although this is just a test dive, Ruan Lin's goal is still to find life, and it is inevitable that he will be a little disappointed.

The Aurora threw out one of the ballast irons under the manipulation of WIT and began to ascend.

The results of the follow-up test were normal, and Ruan Lin couldn't wait to urge WIT to start the official dive.

Aurora ascends and descends at a speed of 70 meters per minute, which means that it takes 23.8 hours to reach the deepest seabed, which is almost an Earth day, and it takes an Earth day to return.

The dive is boring, with only endless darkness around except for the illuminated area. But at this moment, Ruan Lin was still staring intently at the screen, hoping to see life swimming in front of the Dawn.

Ruan Lin had such an imagination, he suddenly sank to the bottom of the sea, and the light that he could see at the beginning gradually disappeared in front of his eyes, and his whole body seemed to be weak, and he could only sink to the bottom of the sea weakly, this process was extremely slow, until he sank to the bottom of the sea, there was only endless darkness around him, and he could never see a trace of light.

When you sink into the deep sea, your eyes are like eternal calamity.

At this time, 156 minutes have passed since the dive, where Aurora broke the record for the deepest dive on Earth at 10,896 meters. It's still dark all around.

For 15 hours, Ruan Lin was still sitting on a chair staring at the real-time image of the Dawn, if it was an ordinary human, his eyes would have been bloodshot at this moment, and he insisted on holding on, so as not to fall asleep at any time. But Ruan Lin still maintained his original sitting posture at the moment, staring at the screen without saying a word.

After 20 hours, Ruan Lin felt great disappointment at the moment, maybe it was time for him to revise the standards of cosmobiology. The only hope left in my heart is the "black chimneys" and hydrothermal springs at the bottom of Europa. Because they are in the vicinity where life is most likely.

In 23.5 hours, the water pressure has reached a staggering 112 megapascals, which is equivalent to 2,000 African elephants stepping on the same person's back.

For 23.6 hours, Ruan Lin saw through the screen the "black chimneys" on the bottom of Europa, which are actually high-temperature hydrothermal activity areas rich in sulfides on the seabed.

At this moment, different colors appeared in front of the lights of the Dawn, they were scattered pale white light!

Ruan Lin jumped up from his chair: "wit! Hurriedly! Turn off the Aurora's lighting system! ”

The lights of the Dawn were extinguished instantly, and the pale white light in front of him made Ruan Lin extremely shocked! They are creatures of the ocean floor of several Europa!