In fact, for Gu Xiaole himself, this crater mountain range has already been here twice.

The first time he came with Ning Lei, Gu Xiaole, who went down to the bottom of the mountain range alone, encountered giant ladybugs and giant tiger striped bird catchers one after another, and ran back directly in fright.

The second time he and Alida had arrived, to escape the helicopter sent by the pirate Black Hand Vulture.

As a result, the helicopter was attacked by an unknown creature and crashed into the interior of the crater, and the two of them had planned to go there to see it clearly.

However, he was attacked by giant bees on the way, and when he returned, he found a deranged sailor who had entered the mountains with the captain of Liu's yacht.

Later, due to the appearance of the zombie pirates, they quickly retreated from the vicinity of the crater to the cave camp on the beach......

This is the third time that Gu Xiaole has entered the interior of the crater mountain range, although it has been some time, but the rope he braided with vines is still tied to the top of the mountain.

Gu Xiaole tugged hard twice, and with good luck, it seemed that this piece of rope could still be used normally.

Alida continued to carefully observe the surrounding situation, after all, this is a strange area where giant insects and zombie pirates have appeared.

"You can go down! I'll go down first, you watch some for me, and then you can go down again!"

After the division of labor was clear, Gu Xiaole grabbed the rope and slowly slid down it with his hands and feet to the bottom of the crater again......

It's been almost a week since I last came here, but it doesn't seem like much has changed.

There are still a large number of tropical plants on the top of the crater, and some of them are very tall plants, which are actually ferns known as living fossils in the plant kingdom.

When Alida also slid down the rope to the bottom of the mountain, she found that Gu Xiaole was staring intently at a fern and watching carefully......

"Did you find anything?" asked Arida in a strange whisper.

"The first two times I came here, I was in a hurry and didn't notice it, but this time I suddenly felt that there were not only those huge and strange insects here, but also the plants here were also very weird!"

Gu Xiaole looked at it carefully for a while and said slowly.

"What's so weird?" asked Arida puzzled.

"Look!" Gu Xiaole casually ripped off a branch and leaf of a plant and said, "This plant covered with scale-like bark is a stone pine among ferns. But this plant must have been extinct tens of millions of years ago! I've only seen pictures in popular science magazines that have been restored from fossils!"

Alida thought for a moment and said, "Do you mean that there are plants from ancient times tens of millions of years ago at the bottom of this crater?"

"Hmm!" Gu Xiaole nodded and continued: "Actually, this just explains why we encounter such a large insect here! Because the age when these ferns are not extinct happens to be an era when the oxygen content of the earth's atmosphere is extremely high.

We now have more than 20 percent oxygen in the atmosphere, but at that time the oxygen content in the air could exceed 40 percent!

That's why insects of that era could grow so big!"

Regarding Gu Xiaole's statement that seemed to make sense, Alida just asked lightly:

"And what is the reason for all this?"

Gu Xiaole was suddenly a little dumbfounded, yes, the earth's atmospheric environment is not tens of millions of years ago, but why is this happening in the valley in the center of this desert island?

Regarding this issue, Gu Xiaole could only shake his head helplessly, saying that he didn't know either.

However, this time they went deep into the inner area of the valley floor of the Ring Mountain Range to find out what mysteries were here, so the two of them stopped talking nonsense, packed up their equipment and began to cautiously move towards the center of the valley floor......

At the same time, Ning Lei and Lin Jiao, the two girls, were guarding the entrance of the small cave, because they were afraid that Leng Zifeng's people would appear, so Ning Lei had already extinguished the bonfire they had lit in the morning.

In the cave, in addition to the silly boy Liu Deaf who slept when he was full, there was also a sister Lin Rui who was relatively bold.

"Sister Xiaolei, do you think Brother Xiaole and Sister Alida will find anything under this valley?" Lin Jiao asked inadvertently while boredom smashing a few ants on the ground with stones.

Ning Lei was obviously more vigilant than her, and at this time she kept the Thomson submachine gun left for her in her hand, and kept scanning the situation in the jungle under the ring mountain range.

However, for Lin Jiao's question, obviously she was not easy to answer, so she could only say vaguely:

"Who knows, but this island is really evil enough, and there will be bugs that can parasitize the brains of primates and turn them into walking dead.

Well, I guess this discovery alone is enough to shock the world!"

Lin Jiao nodded, but immediately asked again: "But didn't Brother Xiaole and Sister Alida say it, do you suspect that this insect is a biological weapon deliberately created by someone?"

"Biological and chemical weapons?" Ning Lei disagreed, after all, this place was too far away from the mainland, and so far they had found a bomber crashed by the Mi Army during World War II on the island.

There is no longer any sign of human activity, and it is implausible to say who made chemical and biological weapons on this island.

Of course, all this is the current speculation of the two of them, what secrets are hidden on this island, and they will have to wait for Gu Xiaole and Alida to come back.

However, in addition to their curiosity about this desert island, Ning Lei's fiancé Leng Zifeng also has a lot of doubts about this place now.

A few days ago, after he asked the pirate base for accurate information about this desert island, he did hear some local indigenous pirates tell him that there are legends of demons on this desert island.

The reason why their leader, the Black-Hand Vulture, lost a large number of men on that desert island several times was because of the attacks of those who had turned into demonic servants.

Of course, Leng Zifeng, who graduated from a world-renowned university like Ning Lei, would definitely not believe the words of these indigenous pirates, in his opinion, these far uncivilized indigenous humans might casually see some natural phenomena and treat them as gods or demons.

And that unlucky black-handed vulture is probably a fool who can only bully some small merchant ships, and he can't even fight Gu Xiaole, a little sling in the city, hum is really enough to embarrass their pirates.

But now, after experiencing the loss of six shrewd and capable men last night, he began to feel that this island was not a little simple.

So this time, he brought some equipment back from the armed yacht he ran aground, and these Mi-style military equipment were obtained by the Leng family at a large price from international arms dealers.

Of course, this time Leng Zifeng has every reason to believe that his team will definitely not let him down!