Human geographers have always been very curious about the Sahara Desert and have never stopped studying it.

However, because the Sahara Desert is so big, the progress of research is not satisfactory.

Judging from the information found by Lu Yuan and Sun Jia.

Today's geologists generally believe that the Sahara Desert was formed about 2.5 million years ago.

It is also the world's largest sandy desert, covering an area of about 9.06 million square kilometers, located in northern Africa.

This area is already about the same as the area of Zhuxia and Mi Kingdom.

The climatic conditions in this region are very harsh, and it is one of the most inhospitable places on Earth for living things.

The name "Sahara" is derived from the Arabic الصحراء, which was introduced from the language of the Tuaregs, a local nomadic people, who in their language means "desert".

The current geographical research argues. During the last ice age, the Sahara was not yet a desert and the climate was similar to that of East Africa.

Geologists on a scientific expedition to the Sahara unexpectedly discovered about 30,000 ancient petroglyphs in the desert.

About half of these petroglyphs are on the N'Ajar plateau in southern Algeria.

The murals depict animals from the river, such as crocodiles, hippos, fish, etc.

Some dinosaur fossils have also been found in the desert.

However, according to ancient Egyptian texts, since 3000 BC, there has been almost no vegetation in the Sahara, except for the Nile Valley and the oases scattered in the desert.

Historians believe that by 2500 B.C. at the latest, the Sahara had become the same desert as it is today, an insurmountable obstacle for humanity at that time.

With only a few inhabitants in the oases, business contacts rarely cross the desert.

The only exception is the Nile Valley, which has become an area of abundant water and one of the cradles of human civilization.

But the Nile has several large waterfalls that are not navigable, which also creates a major obstacle to commercial trade.

Still, Egypt was able to spread iron technology and perhaps the idea of an emperor to Nubia in the south and further south.

By 500 BC, the ancient Greeks and Phoenicians had begun to influence the region.

Greek merchants developed opportunities along the eastern edge of the desert and established many commercial colonies along the Red Sea coast.

Carthage developed along the Atlantic coast in the western desert, but due to the treacherous Atlantic winds, there was no adequate market.

So their exploration never went beyond where Morocco was located.

Centralized states are only distributed on the northern and eastern edges of the desert, and their power does not reach the heart of the desert.

So these people who live on the edge of the desert are often attacked by the Berbers who are nomadic in the desert.

The climate of the Sahara Desert is hot and dry. What is puzzling, however, is when scholars go deep into the interior of the Great Desert.

In this extremely arid and water-deficient mining area, where the land is cracked and plants are scarce, a large number of petroglyphs left over from ancient civilizations have been discovered.

Archaeological evidence shows that a variety of people have settled in the Sahara Desert one after another, and that the cultivation and domestication of plants and animals has led to the specialization of occupations.

Not only that, but the foreign trade of the Sahara region also has a certain scale, and the copper of Maurisis found its way into the Bronze Age civilization of the Mediterranean in 2000 BC.

These are actually nothing, there is such a record in the information queried by Lu Yuan and Sun Jia.

In 1965, when the spaceship of the United States flew over the Sahara Desert.

At a height of hundreds of thousands of meters above the ground, a strange thing was seen.

It is mainly located in the center of the Sahara Desert and is like a pair of huge eyes, not only with pupils, but also with eyelashes, which are so realistic that you will feel creepy when you stare at it all the time.

Later, after research, this eye was so long that scientists called it the Eye of the Sahara, and it is also a rare wonder in the world.

Strangely, the Eye of the Sahara is very visible in space, but it has never been found on the ground.

In order to find the Eye of the Sahara, Misu and Su also experienced an open and secret fight. In the end, however, none of them found the Eye of the Sahara.

Scientists can only study it through photographs from space.

Many people believe that the Eye of the Sahara was formed by a meteorite impact, but the land around it is very flat, perhaps due to the collapse of the ground.

Some scientists have studied the photographs of the Sahara Eye and found that it bears many similarities with Atlantis.

Legend has it that the city of Atlantis was built in concentric circles.

Lu Yuan looked at the photo of the Eye of the Sahara in front of him and agreed to suspect that it had something to do with the Atlantean civilization.

Because from the photo, this Saharan Eye really looks like it is made up of several concentric circles.

At this time, Lu Yuan dug up the records of ancient Egypt and the mysterious desert country that he found in the temple of Galano.

After careful comparative research, he and Sun Jia agreed that the Eye of the Sahara was the mysterious desert kingdom.

Three days later, Lu Yuan said goodbye to Sun Jia and his parents and embarked on an exploration journey again.

Before leaving, Sun Jia proposed to go to the Sahara Desert with Lu Yuan.

Lu Yuan couldn't be happier about this. However, after weighing it again and again, Lu Yuan still rejected Sun Jia's proposal.

The Sahara has always been known as a forbidden area for life. And this time, Lu Yuan is going to the Eye of the Sahara, which has always been full of mystery.

The danger on the road this time is too great, Sun Jia herself does not have too strong ability to survive at night, even if she has her own care, she will suffer a lot.

Lu Yuan naturally didn't want Sun Jia to follow him to suffer, and Sun Jia's research has now entered a critical stage.

I can't affect Sun Jia's development for the sake of my own happiness, it's too selfish to do so.

In the end, after some persuasion by Lu Yuan, Sun Jia stayed and continued to research.

......

After leaving Yingzhou, Lu Yuan first came to Egypt.

Egypt is best known for its pyramids and sphinxes.

Although Lu Yuan was also very interested in these two things, he did not stay in Egypt much this time.

He plans to come back next time he brings Sun Jia with him to explore the secrets of the pyramids and the Sphinx.

This time, his target was the more mysterious Eye of the Sahara.

After Lu Yuan left Cairo, he did not follow the trade routes between the green states like ordinary people, but relied on his body and sufficient reserves and chose to go straight to his destination directly.