The system is the king of the counterattack master

Wadan is a small town located in the central desert area of ​​Mauritania. It was founded in 1147 and has a history of nearly 1000 years.In human civilization, cities that can survive for thousands of years are actually very rare.

Especially in the desert, 1000 years is simply an insurmountable limit for human cities.

Ouaddan is no exception. Although it used to be a necessary place for trade between the Maghreb countries and sub-Saharan Africa, with the deterioration of the environment in the nineteenth century, thousands of people left this historic city and turned to a more livable place.

Today's Watan is just a symbol to record history, like a down-and-out nobleman, showing its former glory to travel enthusiasts with complete ruins.

Compared with the civilized buildings that human beings cannot preserve for a long time, the uncanny workmanship of nature has a longer vitality.

About 20 kilometers to the northeast of Wadan, there is a huge concentric landform, which has always been talked about by people who love geology.

This is the Richard structure located in the western Sahara.

Different from ordinary landforms, Richard's structure is composed of countless layers of concentric circles, which is why it got a nice name - the Eye of the Sahara.

Of course, some people ridiculed him as the chrysanthemum of the earth, patiently waiting for the arrival of good friends in the universe, but these are considered by professionals to be a joking term for boring people, so that they don't even bother to reply.

The Richard structure, also known as the Eye of the Sahara, has a diameter of 48 kilometers. Its cause is still a mystery, and only astronauts can directly observe its full view with the naked eye. Ordinary people can only understand its appearance through photos.

However, some scientists have recently put forward a relatively reasonable explanation for this, saying that there was originally a volcano under the Richard structure, but it failed for some reason on the eve of the eruption, and finally turned itself into a concentric bulge , Later, as the weather got worse and worse, the part that protruded from the ground was blown away layer by layer, leaving only a flat concentric circle structure, which made people slowly guess its cause.

This statement seems very reasonable, but in the final analysis, it is still a conjecture, and there is no evidence that can completely convince people.

And for the person standing at the center of the circle at this moment, whether it is for the volcano or the previously rumored coral reef is not that important. For him, what is under the Eye of the Sahara is the most important thing.

"Are you sure it's down here?" A gray-clothed man wrapped like a rice dumpling pointed at his feet in doubt.

"At least the detector told me that I'm here." His companion replied with arms crossed, and at the same time stepped on the solid ground with her feet. Ganlin's feeling.

"Are you kidding? This ground is at least tens of thousands of years old, how old is your thing? Besides, isn't it a bit far from where you landed? Even a tornado can't blow it here? "The mysterious man's statement about his companion did not show any disbelief.

His companion slowly bent down, stretched out a porcelain-like arm from the wide clothes, and gently pressed the ground under his feet, and the ground instantly glowed with a blue light, penetrating below the surface.

After a while, she stood up again, pointed to the place she touched just now and said with certainty: "It's absolutely right, it's just below here, I don't know how it got here, but I'm sure, It is about 400 meters below our feet, it seems that we need to trouble a little bit."

The man in gray was speechless for a while, walked around the place pointed out by his companion a few times, and finally sighed: "It seems that we need a good engineer shovel. When digging 400 meters, an ordinary shovel may dig [-] meters. Pedicure knife."

A look of dismay flashed in his companion's eyes, and he waved his hand to let him get out of the way: "Let me do it, even if you bring the best engineer shovel, you can afford it, but I can't afford to wait, We are here to find things, not to rob graves, and efficiency is the priority, so I advise you to save your time."

The man in gray who was despised by his companion did not show any displeasure. Obviously, it was not the first time for the two of them to work together. Seeing that his companion really wanted to make a move, he quickly stopped her: "Aren't you going to use a digger?" Are you kidding me? Dig a hole in this place and tomorrow morning we'll be making headlines all over the world."

Then, he pointed to a small hill 100 meters away: "Do you see that place? There is a hole below that, which can lead to the ground. You just need to level the hill above. I beg you, don't Make trouble for me everywhere, okay, the last time I was looking for something, I almost took over the entire camp. Fortunately, I reacted quickly and found someone to take the blame for this, otherwise we would have been exposed long ago. In order to be sooner To achieve your wish, please listen to my command?"

What the man in gray said made his companion a little upset, but she thought about it for a while, and finally sighed: "It's a big deal, I'll just say hello to you in advance, why are you so fierce. Besides, last time Wasn't there an accident? We cooperated very well last time, didn't we? Look, everything has to go through a process. Besides, you know there is a passage over there, so you should have told me earlier, it's obviously you No, blame me."

The man in gray was speechless for a while, but he finally gave up arguing with his companion and dragged her to the mound he pointed out just now.

"Are you still coming?" The man in gray looked at his companion and asked.

The sandstorm in the desert was very strong, and both of them wrapped themselves tightly, so they could only see each other's eyes clearly, and the rest could only communicate through words.

"It's better for you to come, I'm too noisy, maybe it will cause some unnecessary trouble." The companion spread his hands, and then made a gesture of invitation.

The man in gray rolled his eyes and walked to the front of the mound.

He took a general look at the appearance of the mound, and then walked around it again, knowing what he knew.

This thing that seems to be covered with gravel is said to be a mound, but it is actually a hard rock underneath, which was obviously placed here on purpose to block the entrance of the cave.Moreover, in order to make the entrance of this hole more tightly blocked, the person who set up this mechanism even used a little brains to dig a deep hole under the rock, which is equivalent to laying a foundation for the rock. If you can't figure out the mystery of this thing, you will only treat it as an ordinary sand dune.

The man in gray looked at the rock door, smiled slightly, spotted the position of the stone, took two steps back, stomped his feet lightly, and the ground trembled slightly, and then the ground shook more and more violently. When the tremor reached its peak, the stone that had been connected to the ground slowly floated up.