It was total, utterly dark, with no light source in either direction. With the naked eye, you can't see anything at all.

Low-light night vision devices don't work well here.

Fortunately, the submarine built by Chen Yue is equipped with a special radar that can scan the terrain and environment within a certain range.

So, in this completely dull pitch black, the submarine continued to descend.

When descending to a depth of about 100 meters, Chen Yue steered the submarine and turned on several searchlights installed around it.

The pillar of light shone out, illuminating the surrounding waters, but it only extended for more than ten meters, and the light of the high-intensity searchlight was swallowed up by the darkness.

Chen Yue carefully inspected the water here, and saw that there was a large amount of particulate matter suspended in the water, flowing with the ocean current. After taking a little specimen for testing, Chen Yue found out that the particles were all kinds of debris mixed in, such as silica oxide, magnesium sulfate and other inorganic substances, without any signs of life.

Chen Yue continued to dive and soon reached a depth of 1,000 meters.

Except for the change in water pressure, there is little change between a depth of 1,000 meters and a depth of 100 meters. But here, Chen Yue vaguely saw a mountain looming in the distance.

The submarine moved forward and soon came to the iceberg.

It's like a wall, up, down, left and right.

Chen Yue knew that the position he was in at the moment was just an ice crack.

Europa is covered with a thick ice sheet all over the world, with an average thickness of up to 50 kilometers. The crack where I am located is relatively thin, but it also looks like it is 30 kilometers. It's still early to reach the bottom of the sea.

The submarine continued to dive, and when it reached a depth of about 2,000 meters, suddenly, with a rattling sound, the submarine lost contact with Chen Yue.

According to the last data transmitted by the submarine equipment, Chen Yue knew the reason for its destruction.

The water pressure was too great, and the deformation of the hull caused a crack to appear somewhere, and the raging sea water poured in, and the submarine broke down.

Chen Yue was a little speechless.

Although the depth of this dive is 2,000 meters, Europa's gravity is only about 13.4% of that of Earth, which means that the water pressure here is only equivalent to the water pressure of the Earth's ocean at a depth of 270 meters. I didn't expect the submarine I built to be so inhibitable.

"It's still not up to par with material technology."

Chen Yue sighed.

Half a month later, the second specially built submarine set off, still diving from its original position.

Although Chen Yue's material technology is not as good as that of humans at his peak, Chen Yue also has advantages. His advantage is that he has extremely strong industrial capabilities, which can pile up enough performance at any cost and at any cost. In addition, this is an unmanned submarine, which does not require the installation of life-supporting facilities at all, which reduces the possibility of many failures and improves reliability.

This time, the submarine descended to a depth of 10,000 meters, but it was still far from reaching the bottom of the sea.

In the process, Chen observed that Europa's subglacial ocean also has a distinct layered structure, some of which are extremely clear, like pure water, and some are very turbid, and there are many ocean currents. According to Chen Yue's speculation, this should be related to Jupiter's gravitational pull on Europa's inner core.

But Chen Yue still failed to find any signs of life.

"Keep it up."

With the lessons of the first two failures, Chen Yue quickly updated and iterated and quickly built a third submarine, which successfully dived to a depth of 12,000 meters, followed by the fourth, fifth, and sixth submarines......

It wasn't until the 20th ship, which was upgraded 20 times, that the spherical submarine barely dived to a depth of 30,900 meters, and finally passed through the thick ice and reached the bottom of the ice.

In the lateral position, Chen Yue saw the thick ice spreading into the distance where he could not see.

The ice, which is more than 30 kilometers thick, is suspended above the liquid water like a thick quilt, blocking all the radiation from Jupiter and providing a stable environment here.

"It's nice to have a neutrino telescope here."

Chen Yue thought so.

Neutrinos are extremely penetrating.

A person on Earth gives a thumbs up, and on the fingernail of that thumbnail is crossed, on average, more than 50 billion neutrinos pass through it. But almost one of these neutrinos will not collide with the particles that make up the human body.

In fact, they can penetrate the Earth almost unhindered.

Neutrinos must be observed in places with very low background radiation.

Most of the neutrino telescopes on Earth are built in deep underground caves. But Chen Yue is sure that even the earth's underground caves have less background radiation than under the more than 30 kilometers thick ice.

This is a more suitable place to build a neutrino telescope.

In particular, neutrino telescopes are also useful for observing conjectures of dark matter, which is of great benefit to improving basic physical theories. This made Chen Yue even more unable to let go of here.

"But there's no hurry, take your time."

Chen Yue thought and continued to dive.

At a depth of more than 30,000 meters, it only penetrates the ice and does not yet reach the bottom of the sea.

It is still about 15,000 meters from the seabed.

In the midst of this slow dive, Chen Yue suddenly saw a little light appear in front of him.

Well?

Chen Yue's heart moved.

There is no light source here, tens of thousands of meters deep in the sea. This is where the light source appears......

The submarine slowly approached the light.

The next moment, the light suddenly disappeared. The next moment, it appeared in another direction.

Isn't it because of the ocean currents, but it can move autonomously? Furthermore, can you actively control whether it shines or not?

This......

Is it life?

Life on Europa?

Chen Yue immediately became solemn, and there was a little excitement in his heart.

Chen Yue turned on the searchlight and searched carefully. After a while, I saw something that was roughly similar to a dandelion, with a total length of only about ten centimeters, a relatively large head, and a long tail dragging underneath.

The thing's tail twisted and twisted, moving slowly through the depths of the ocean.

There are many of them, and there are all densely packed in front of them, and there are at least tens of thousands of them in this small space that is illuminated!

"It's really life!"

Chen Yue opened the door of the submarine, and the current immediately poured in a little, sucking in one of the suspected lifeforms.

"One is not enough."

Chen Yue managed to catch several more, but he didn't care about continuing to move towards the bottom of the sea, so he directly surfaced and returned to the surface.

The specimen in the submarine was immediately taken by the robot to a laboratory with sufficient observation conditions, and Chen Yue immediately manipulated various instruments to observe it.

At this moment, this suspicious thing of life has exploded due to the drastic reduction in pressure. Chen Yue only observed their corpses.