When the ice worm arrived at the frozen lake, the situation was completely different, and as soon as the ice worm touched the water, the original round little body immediately changed, and the circle was constantly elongated, and in the end, it became a long worm with a small arm.

In addition to the great change in appearance, the second is that its movement is no longer a small jump, I saw its long body gently rotating in the frozen lake, turning faster and faster, and later, its movement speed is not slow, almost reaching 70 kilometers per hour.

The ice worm is like a spinning arrow, under Li Feng's order, constantly diving into the bottom of the lake.

However, Li Feng soon discovered the problem, although this frozen lake is not large, the depth is really surprising.

As time passed, carefully calculated, the distance of the ice worm diving to the bottom of the lake was probably more than ten kilometers deep, but its bottom still seemed to be endless.

"I'll go, this frozen lake, can't it go all the way to Europa's center of the earth?" Li Feng recalled that there was information about Europa, and then it was a little clear, and the information said that it was indeed mentioned that the deep layers of Europa were very likely to be a large amount of water, and if this was the case, it would not be surprising.

Holding on to more patience, Li Feng still paid attention to the ice worm diving, and I don't know how long it took, I felt that this depth was at least sixty or seventy kilometers deep, and finally, the ice worm's efforts were still rewarded.

The environment in the depths of the frozen lake has finally changed, but not at the bottom of the lake, but in a headless area of water.

It turns out that the ground world of Europa under the glacier is really full of water, and the ice on the ground is frozen to a thickness of tens of kilometers, which is really amazing!

To Europa's real underground ocean world. At this moment, Li Feng realized that human beings' understanding of this satellite was too small.

What is the only star with a high probability of life?

This is not highly likely, but in the world of the underground ocean, full of endless life.

These lives are the three microorganisms that Li Feng found in the frozen lake before, they are very few, and the largest one is comparable to dust. But the number is very large, almost innumerable, and the number is endless.

Even Li Feng had the idea that the entire underwater world of Europa had their shadows in every corner.

In addition to the three microorganisms that had been discovered before, in the underwater world of Europa, Li Feng discovered a fifth life element, which was a plant that looked a little like the earth's cypress.

Their maximum growth is only about 40 centimeters, almost in the underwater world. They can also be seen, and they just survive floating with the waves underwater.

They are much larger and even provide billions of billions of microorganisms with a large amount of nutrients.

Here, Li Feng finally saw a very unitary food chain world, where cypress grass gave three kinds of primitive-born microorganisms a large number of nutrients, but the three microorganisms were the food source for those invisible monsters.

Although Li Feng still couldn't see the invisible monsters in the water through the vision of the ice worms, the traces of the world under the water and ocean were everywhere.

Right now. Li Feng finally knew why it was a small frozen lake, but why so many invisible monsters could emerge in a steady stream.

Because this frozen lake is not a small lake that is limited and fixed. Its depths connect the entire underwater world of Europa.

After solving this question, Li Feng was slightly disappointed in his heart, because this was destined to not allow him to find clues about how to deal with invisible monsters, but only to solve the mystery in his heart before.

After having no target for the time being, Li Feng had no choice but to let the ice worms continue to dive into the underwater world.

He wanted to see deeper into this ocean world of Europa. Is there still a sixth life, and God knows how deep this aquatic world is? What else is stored below?

Everything that goes straight down is spent like this.

The flying machine in the air has been floating in mid-air like this, and Li Feng and the three of them can only stay in the aircraft. When you are sleepy, you can sleep and eat two special nutrition pills when you are hungry.

This kind of simple and boring days lasted for about half a month, and the ice worms that were so burdened also kept drilling down so simply.

When they are tired, they turn into balls again, rest quietly in the water, and the hungry ice insects find the microbiota to prey for a while.

After the nineteenth day, when the patience of Li Feng and the three of them was almost exhausted, the ice worm finally dived to the bottom of the water and ocean world.

But a black shadow appeared not far away, but it finally made Li Feng bounce up from his boring state.

"What's wrong, there's a discovery?" Seeing this, the steamroller polo also woke up and hurriedly asked excitedly.

But Li Feng didn't answer this guy, but he still closed his eyes again, shared through the vision of the ice worm, and stared blankly at the black shadow not far in front of him.

The most unlikely thing happened!

In any case, Li Feng would not have expected that at the bottom of Europa's ice ocean world, there would be a castle-like building.

Who had the skills to come to Europa early and build this majestic castle building?

The entire castle covers an area of about tens of thousands of square meters, and judging by the style, it seems that this is not done by humans.

Similarly, Li Feng did not think that humans had this ability, and built this castle under the water and ocean on Europa early.

Then there is only one question left, did you encounter an alien building?

Although the flying machine that the three of them are staying in at present is also a product of aliens, when he really saw a castle building related to aliens, Li Feng was still full of shock.

In this world, there really are intelligent life forms other than human beings.

After cleaning up the excitement in his heart, Li Feng hurriedly instructed the ice worm to drill into the castle.

When he arrived at the gate of the castle, Li Feng found that the gate of the castle was not closed, but allowed to be opened, as if it had been open for a long time, and looking inside through the door, he couldn't see a little anger, daring, even if this castle was built by aliens.

But it has long been abandoned and abandoned.

Knowing this situation, Li Feng was both relieved, but somehow a trace of disappointment rose.

But he quickly drew his attention to the two squatting stone guards standing on the left and right sides of the city gate.

These two squatting stone statue guards are really not human appearance, they are more like lizard people, with a large lizard head and the size of a human body.

They were roughly about one meter seven in height, and Shi Wei held a pair of harpoon-like weapons in his hand.

An alien civilization that uses cold weapons?

Li Feng was a little stunned, but soon, he overturned this wrong idea, because he carefully and further figured out that the three-pronged weapon of this harpoon actually had a square crystal of purple energy at the position where the handle end was connected to the three-pronged.

These crystals, Li Feng could see at a glance, were similar to the compressed energy blocks originally used on the aircraft, but the volume and color were different.

Although it was only a stone statue, Li Feng was absolutely sure that if this was like the weapons of these lizardmen, it would definitely be more than just the power of cold weapons.

"It seems that these lizard aliens should be said to be a kind of aquatic aliens, I don't know if they are the same race as a kind of lizardmen that once appeared on the earth." Li Feng said secretly in his heart.

After looking in front of the door for a while, but finding nothing, the ice worm went into the castle inside under Li Feng's instructions.

What happened next, except for the two squatting stone statue guards, there were no more alien traces and discoveries in the entire castle, as if the owner of the entire castle had emptied it.

Crossing the square in front of the castle and entering the castle, the only thing that caught Li Feng's attention was the murals and reliefs on the castle walls.

These styles are completely different from humans, and this is indeed a castle built by aliens, because these styles are simply difficult to imitate or fake.

The real castle building is actually not very big, and there is no hotel on the planet that is bigger than it. Walked around the castle a few floors, except for the relief and fresco civilization that could not be taken away.

Nothing was found.

In the end, Li Feng simply ordered the ice worm to continue to drill into the back garden of the castle, and when the ice worm passed through an arched doorway, what it saw finally made Li Feng violently lift his spirit.

In the back garden of the castle, there are many wilted and dead roots, these flowers and plants seem to be also aquatic creatures, but they have long been turned into ashes and dead roots after a long time without taking care of them.

However, I don't know what their essence is, but after so long, they have not turned into barrenness, and the traces left vaguely are still visible at a glance.

But what really attracted Li Feng's attention was not these flowers and plants that had long since withered, but a flesh-like cylinder standing in the huge back garden.

Because this fleshy cylinder is moving, it turned out to be the only creature in the entire castle that Li Feng had found so far.

But what shocked Li Feng even more was that it was on this Roshan-like cylindrical building, and the entire Roshan-like cylinder was about 20 meters high.

Around its body, there were giant spores hanging one after another.

And the appearance of these spores has a thin and transparent coat, and looking through this coat that looks like fleshy skin, it is one humanoid creature after another.

They had six toes, three tripronged fingers, bulging eyes and cracked mouths, which were exactly the same as the invisible monsters that Li Feng had seen before.

And at this moment, these monster fetuses are quietly staying in the spore fetus, Li Feng looked around, the entire Roshan cylinder, there were no less than dozens of monster fetuses hanging, at this moment, Li Feng finally understood why these invisible monsters appeared in Europa.

It turns out that they are the biochemical products left behind by these lizard aliens? (To be continued......)