It didn't take long for more and more Chinese horseshoe crabs to fill the water, and finally a sizable school of fish formed densely. Schools of fish were so dense that the entire underground river was so dense that even the river was pitch black.

Among these Chinese horseshoe crabs, there are also several small sharks about one meter long. No wonder, there was such a big movement just now, it must have been the movement of these little sharks.

Because the Chinese horseshoe crab is a hard-shelled creature, the baby shark has little interest in the former, and the two sides live in peace.

It is already a rare thing to have Chinese horseshoe crabs in freshwater, and there are sharks in it, and they are in freshwater rivers, which simply subverts everyone's cognitive level.

Seeing the shark, Chen Yonghe suddenly remembered: "No, this is not the only strange place, there is another place in the world, similar to the situation here." ”

"Where is it?" both Mo Feifei and the fat man asked curiously.

Chen Yonghe's eyes converged and he said four words: "Lake Baikal." ”

Fat man: "Baikal, what is it?"

Chen Yonghe still didn't seem to like the fat man and ignored him.

He had heard of the lake, and he thought about it with recollection: "Lake Baikal is a freshwater lake in southern Siberia, Russia, in the Irkutsk region and the Republic of Buryatia. It is the birthplace of many ethnic groups in East Asia. The place where Su Wu shepherded sheep for nineteen years is here.

It is also the world's largest freshwater lake and the deepest freshwater lake. It has been calculated that if the world's fresh water were to disappear, the water of Beijing's Aier Lake would support the planet for 42 years.

Lake Baikal, which means "lake of nature" in Latin, "lake of abundance" in Tatar, and "unquenchable flame" in Mongolian, is called "North Sea" in ancient Chinese books. I heard that this place, it is very beautiful and is a famous tourist attraction. ”

Unexpectedly, Mo Feifei even knew several of its names, and Chen Yonghe and the fat man were impressed by him.

After a pause, Chen Yonghe took over and said, "That's right." But the most amazing thing about it is not how beautiful the scenery is, but one of the mysteries about it - the unsolved mystery of Lake Baikal. ”

"The unsolved mystery of Lake Baikal?" Mo Feifei and the fat man said in unison.

Chen Yonghe pecked his head and continued: "That's right. What puzzles scientists is that Lake Baikal is a freshwater lake, but it is inhabited by many authentic marine life, such as seals, sharks, conchs, etc. And among the freshwater lakes in the world, only the bottom of Lake Baikal grows a dense "jungle" sponge, and strange lobsters grow in the sponge. I just linked this to Lake Baikal. ”

Seeing that the two of them were fascinated, Chen Yonghe continued: "At first, scientists thought that Lake Baikal was connected to the sea, and that marine life entered Baikal from the ancient ocean. This argument doesn't work, and some people try to put marine creatures in fresh water, and they die very quickly, and the environment is not right.

Later, the former Soviet scientist Verishagin believed that this was the result of changes in the earth's crust. He said that based on paleontological and geological materials, there was a vast Transbaikal Sea in the area east of Lake Baikal during the Jurassic period of the Mesozoic Era. Later, due to changes in the earth's crust, an inland lake, Lake Baikal, was left. With the continuous addition of rain and river water, the salt water became lighter, and the current "marine life" is left over from the receding sea at that time. ”

Later, this conjecture was also disproved. The reason for this is that several deep wells were drilled near Lake Baikal. From the core samples taken, no Mesozoic sedimentary layers were found, but only Cenozoic sedimentary layers were found. These physical evidence prove that the Baikal region has been on land for a long time, and there is nothing outside the Baikal Sea. Lake Baikal is a fault lake formed by the fracture activity of the earth's crust. ”

"What's more, to link this phenomenon to the supernatural forces of the universe"

"The fish are gone, and the fog has faded. The fat man saw that Chen Yonghe had finished speaking, so he spoke.

But no, it had only been a minute or so, and there was no movement of any fish in the water, only the sparkling surface of the water, and then told them that a large group of magical fish had swam here just now.

At this moment, everyone doesn't have to think about why there are fish in the sea in freshwater, how can scientists know the questions that scientists have not answered. The most important thing they should think about now is how to get through it.

The more they delay, the more passive they can become. Moreover, now that everyone's physical strength is seriously depleted, and there is no food supplement, one more second of delay will be one more risk.

The three of them had no other choice, and after waiting for about ten minutes and feeling that there was no change, they continued to try a second time.

For the first ten meters, they walked smoothly and did not encounter strange fish or other creatures. Ten meters later, the river was already up to everyone's nose. I had no choice but to spend a little more physical strength and swim over.

Although the river water is not as cold as expected, it is also relatively speaking, and the taste of cold water soaking into clothes is still very unpleasant. In addition, they were all wearing thick clothes, which became very heavy after absorbing water.

As a result, the three of them had a hard time swimming in the water.

Plop plop!

Make the splash as loud as possible to maintain the momentum you need to move forward.

As soon as I swam seven or eight meters, the fog on the surface of the water suddenly became worse again. And this time the fog was even more urgent and heavier than the last one, as if there was some monster in the water, which could swallow the clouds and spit out the fog in an instant.

Soon, the fat man's vision began to blur. Even if he knew that Mo Feifei and Chen Yonghe were not far in front of him, he just couldn't see clearly.

The fat man shook the waterproof lamp in his hand and shouted softly: "Brother Fan, Brother Fan, where are you?"

In the thick fog, a voice came: "I'm here, I'm here." ”

The fat man didn't think much about it, and quickly accelerated his speed and rowed in the direction of Mo Feifei. As far as he remembers, it seems that the width of this underground river is no more than twenty or thirty meters. However, he paddled more than 30 meters in one breath, but still did not reach the shore.

You know, he walked nearly ten meters just by walking.

Ten meters plus thirty meters equals forty meters, which is already more than the width of the riverbank.

Could it be that your own estimation is wrong?

The fat man continued to shout a few times: "Brother Fan, Brother Fan, have you arrived?"

Strangely, Mo Fei still replied: "I'm here, I'm here." ”

This time, the voice was much stranger and sharper than the previous one. The fat man remembered a plot in "Notes on Tomb Robbery", there is a snake called pheasant neck, which can learn to speak.

Could it be that the person who answered to himself just now was not Mo Feifei?

As soon as he thought of this, the fat man was so frightened that tears fell, and he said with a crying voice: "Brother Fan, don't scare me, are you talking?"