On the periphery of that large area of ancient city ruins, there are already many broken walls.

It is estimated that after the completion of the main city of the Celestial Elephant Country, many people from the surrounding areas moved here, and there was no room in the city, so they could only build houses outside the city.

And the main city wall, although it has gone through thousands of years of wind and sand, still looks much taller and majestic than other surrounding buildings.

The walls are naturally dilapidated, but the roots are almost complete.

Stretching out in both directions, its width is at least five thousand meters wide.

In the middle of the city wall, there is a large gap three or four meters wide, which is naturally where the city gate is.

It's a pity that the city gate has long been gone, and you can only imagine the prosperity and strength of the Celestial Elephant Kingdom from the root of the remaining city wall.

Everyone, including Chu Changjiang, couldn't hold back their excitement, jumped off their camels one after another, and searched for ancient curiosities inside and outside the city.

However, Chen Xiaopang was afraid that the first group would find the tomb and destroy the cultural relics, so he did not dare to conduct detailed exploration in this ancient city ruins that were enough to make archaeologists sleepless for days and nights, but urged Chen Dalin to quickly find the entrance to the tomb he had entered.

Chen Dalin said: "It's been more than ten years, and it's really a little difficult for you to let me accurately point out the entrance to the tomb, but I remember that the tomb is next to the huge explosion crater, let's find the explosion crater first, and then find the entrance to the tomb!"

Others, naturally, have no opinion.

According to Chen Dalin, in order to find the explosion crater, he must first pass through the entire ancient city, and he remembers that the explosion crater is in the northernmost direction of the ancient city.

The ancient city sat north and faced south, and the group immediately entered the city gate, and walked slowly along the main street facing the city gate, towards the north.

When I looked into the distance, I saw that at the end of the street, there was suddenly a dark pit.

The pit was so huge that it occupied almost one-third of the entire ancient city, so as soon as you entered the ancient city, you could see it immediately.

The high and low walls on both sides of the street were full of broken walls, and the height of these walls was much lower than the broken walls outside the walls, and the closer you got to the pit, the lower the height of the broken walls.

By the time we reached the edge of the pit, all the broken walls remained, leaving only a small section of the wall almost level with the ground.

In a situation like this, everyone can know without imagination that the explosion not only formed such a huge crater, but also radiated a huge shock wave outward, destroying all the buildings in the city.

So the closer you get to the center of the explosion, the greater the impact you will experience.

When they reached the outside of the city wall, because the thick city wall blocked most of the impact force, it was likely that the buildings outside the city wall were not greatly affected.

It's just that those people outside the city walls, for some reason, turned into desert savages, and they all abandoned their homes to wander in the desert, and finally these houses and buildings outside the city also became dilapidated ruins.

As for all the people inside the city walls, I am afraid that they would have been destroyed in the moment of the explosion.

But more than a thousand years ago, what kind of explosion was able to cause such great destructive power?

What kind of explosion can turn the remaining people into bloodthirsty beasts?

Everyone stood at the edge of the pit, shocked by the huge pit in front of them, and for a long, long time, no one made a sound.

In the end, Bai Yang came back to his senses and opened his mouth to ask Chen Dalin: "Old man, where is the entrance to the tomb you mentioned?"

"I think it's going around this crater to the other side of the crater...... I remembered that after bypassing this crater, I had to go out of the city wall on the other side! Since it was a tomb, it would not be built inside the city wall......! More than ten years have passed, and all I remember is this crater, and I have almost forgotten everything else!"

Chen Dalin's words can be understood by everyone.

In fact, seeing such a big pit, the shocking feeling makes everyone feel that what can be remembered most clearly in ten years will also be this big pit.

"Then ask the old man to help bring the camel over the edge of the crater, and I will go down to see how this crater was formed!" Chen Xiaopang said.

He was anxious to catch up with the other group, but at the moment all his mind was drawn to this huge explosion crater.

In fact, the most important thing for everyone to do now is to figure out the cause of this crater, because that could very well rewrite history and even overshadow all the most important archaeological discoveries in the world.

Of course, this crater will always be here, and they can wait until they come out of the tomb to study it slowly.

But the problem is that anything can happen inside the tomb, and no one is 100% sure that they can enter the tomb safely and come out of the tomb safely.

If we don't figure out the cause of this explosion crater, we will really face a life-and-death situation, and I am afraid that we will not be blind to death.

Of course, such a thought is very unlucky, and no one really thinks about it like this, but in the subconscious of the heart, there is indeed such a thought.

Among all the people, Chen Xiaopang is the most enthusiastic about archaeology, and since even he wants to find out the cause of this explosion crater first, the others naturally need to say it.

Including Chu Changjiang and Max, they all got off the camels and followed Baiyang and others down to the explosion crater to investigate carefully.

The crater is also covered with a layer of floating sand, and the lower you go to the crater, the deeper the floating sand becomes.

Bai Yang and the others first used their hands to remove the floating sand at the edge of the crater, checked the soil layer below, and found that although the surface of the crater also formed a smooth hard shell, this hard shell did not show a glass-like texture.

One of the most striking features of a nuclear explosion is that it will cause the entire land around the crater to be vitrified by high temperatures.

This discovery made everyone faintly disappointed, but at the same time it was a long sigh of relief.

After all, a nuclear explosion more than 1,000 years ago was simply inconceivable.

But if it weren't for a nuclear explosion, what explosion could have produced such a powerful force that not only formed such a large crater, but even destroyed all the houses in the entire city?

If it's just gunpowder, how much gunpowder is there?

Moreover, gunpowder alone cannot form a very powerful shock wave, so it must require a very advanced device that can confine gunpowder to it.

And advanced devices like this are still not possible for humans more than 1,000 years ago.

What's more, the desert savages appeared after this explosion, which indirectly proves that this explosion not only has a shock wave that destroys everything, but also has a very destructive polluting power on the surrounding environment.

What could be the material that could cause such a powerful, yet bizarre explosion?

- One thing is for sure, this will not be a crater.

Because meteorites fall diagonally into the soil, the crater can never have such a regular circular shape. It is even more unlikely that the lowest point of the crater is just in the very center of the circle.

The only thing that can cause a large crater of this shape is a super-powerful explosion.

The more they thought about it, the more confused they became, and they could only walk down the edge of the crater.

Chen Xiaopang used his iron shovel, which never left his body, to dig open the black sand at the bottom of the explosion crater, and several people suddenly discovered that at the bottom of the explosion crater, which was also the direct focus point of the big explosion, there were about 30 square layers of soil, which indeed showed vitrification.

In other words, although the Big Bang at that time was not a nuclear explosion, it was not much hotter than a nuclear explosion.

It's no wonder that in Yunlang City, a hundred and ten kilometers away, you can also see the mushroom clouds rising up.

"You say, is this a nuclear explosion? If so, why couldn't a nuclear explosion occur more than a thousand years ago? If not, what kind of explosion would it be that could cause a nuclear explosion with a strength and heat that is not much different from that of a nuclear explosion?" Chen Xiaopang said, looking confused and confused.

But no one could answer him, and everyone was just as confused and confused as he was.

"It's a pity that we don't have the equipment to test the radiation value, otherwise if we test the radiation value in the soil of this place, we might find something!" Ding Lingling said.

"It's been more than a thousand years......! There was a nuclear explosion more than a thousand years ago, and the nuclear radiation in the soil must have been almost lost, right?" Iron Bull questioned.

"If it is really a nuclear explosion, even after a thousand years, the radiation value in the soil should still be different from that of normal soil!" replied Ding Lingling.

"Then let's bring back some of the soil from the explosion crater and these vitrified samples, and wait for the test to be done slowly in the future!" Chu Changjiang said.

Everyone else felt that it was all there was to be.

So Chen Xiaopang first raised the shovel, smashed some vitrified soil layers, and carefully wrapped them. Then dig up a little bit of the soil under the glass layer and wrap it up.

(See Chapter 166 of "The Legend of the Celestial King")