Lu Yuan felt that there were more and more doubts, what was wrong?

Mammals such as horses, deer, and sheep could not have appeared 70 million years ago.

Triceratops is also unlikely to have appeared 55 million years later in the current understanding.

"Could it be that the fossils of this triceratops and giants and the surrounding fossils themselves do not belong to the same age!"

Lu Yuan can only think like this for the time being, under normal circumstances, fossils of different ages will not appear in one place.

However, this is not absolute, and occasionally there are geological changes that cause fossils that were buried earlier to be exposed to the ground.

It is also possible that a later animal came to the place and was buried together.

Lu Yuan now feels very sorry, he has no way to do the appraisal now, otherwise there would be no such troubles.

There's no way to date the fossils anyway.

Lu Yuan simply put these fossils into the space temporarily, and now he can only wait until he returns to Yingzhou to continue his research.

Lu Yuan stayed in this area for a whole week before choosing to leave.

This time his harvest in the area was huge, not only the fossils of triceratops, but also the fossils of several other giant beasts.

However, there were several other giant beasts, and Lu Yuan did not find any records in the information on his computer.

These behemoths are likely to have never been found before.

Although Lu Yuan's harvest was already very huge, in fact, the surrounding area had not been completely explored.

There are still many fossils in this area that have not yet been excavated.

At this time, for the sake of scientific research, the best way to do this is to pass on the news of the presence of a large number of prehistoric fossils here, and then organize a high-level team to excavate and study this place.

It's a pity that in order to prevent several surrounding countries from discovering the conflict, Lu Yuan had to hide all this for the time being.

After marking the location of this place on his exploration map, Lu Yuan continued to move towards his original goal.

This place can only be hidden for the time being, waiting for it to be studied when it has more power, strong enough to prevent conflicts between neighboring countries.

Lu Yuan continued to advance like the west, and the front became more and more dry and desolate.

The surrounding scenery is also becoming more and more distinctive, walking in this mysterious land, Lu Yuan has a feeling of going to an alien planet.

After walking through the desert for ten days, a different scenery finally appeared in front of Lu Yuan's eyes, which was the long-lost green representing life.

Lu Yuan happily ran forward, and more than an hour later, he entered the first oasis he had seen in a month.

Before entering the oasis, Lu Yuan expected to meet a group of indigenous people.

But the reality really made him feel very confused.

In Lu Yuan's opinion, the area of this oasis is not small, at least 20 square kilometers.

In the middle of the oasis is a lake that is not too small.

The water of the lake is very deep, and there are many aquatic creatures living in it.

The vegetation in the oasis is also abundant, and staying in the middle of the oasis makes you feel like you are in a forest.

If it weren't for Lu Yuan's early knowledge that this was the center of the Sahara, he would not have imagined that this was in the depths of the desert from the surrounding environment.

But it's such a good place that there are no human beings.

Faced with such an unreasonable situation, Lu Yuan couldn't help but raise his vigilance.

He turned on the positioning system first, but to his surprise, there was no satellite signal received here.

His supposedly state-of-the-art positioning system could not locate the place.

Lu Yuan took out the map he had obtained earlier in surprise, and he found that he had actually entered the so-called Eye of the Sun.

It was only at this time that Lu Yuan suddenly noticed that this oasis turned out to be a very regular circle.

He thought of the Death Legion mentioned by the village chief, and his heart was once again vigilant.

Lu Yuan cautiously walked through the oasis.

He intended to head to the only hill in the oasis first.

It is also the highest point of the oasis, where you may find something.

After two hours, Lu Yuan came to the foot of the hill.

Only then did he realize that there was a stone building on the hill.

Lu Yuan raised his vigilance again and walked towards the building on the hill.

He breathed a sigh of relief when he arrived at the building, there were no living humans here.

He entered the building and found it crudes, even rougher than he had imagined.

Lu Yuan felt that the level of architecture here was similar to the level of ancient Siamese buildings he had seen during his trip to Siam.

Judging from the craftsmanship of these buildings, it is clear that the builders were not of a high civilization.

After some searching in the building, Lu Yuan found some paintings painted on the building.

What made Lu Yuan curious was that there were no scenes about the desert on these paintings, and there were no desert animals such as camels.

There are more animals on the picture, which are similar to the petroglyphs found by Lu Yuan before, and there are also rhinoceros, hippos, buffalo and other animals.

However, unlike before, these murals also depict human beings.

The humans depicted in the mural are predominantly black, with some white spots on their shoulders and backs.

In terms of appearance, they are very similar to the residents living in the central and western regions of Kunlun Continent, and their body shape is also quite consistent.

However, after Lu Yuan finished reading the mural, he found that although the characters on the mural were mainly black.

But these blacks were clearly enslaved.

There is also a species of human being covered in armor on the mural, who is stronger and taller than the black people.

From the picture, they are clearly masters, while blacks are just slaves.

At this time, Lu Yuan couldn't help but think of the earlier research of scientists on the Sahara Desert.

As early as 100 years, many traces of prehistoric civilization have been found in the Sahara.

Especially in 1933, a detachment of Gaul cavalry passed through the Sahara.

They found groups of petroglyphs several kilometers long on the plateaus of Tasilitai and N'Ajer.

The appearance of these petroglyphs shocked the whole world at that time.

It was also from that time that the perception of the Sahara began to change.

The scenes on these petroglyph groups have many similarities with the murals that Lu Yuan has now discovered.

These petroglyphs also depict scenes of ancient human life in the Sahara.

There are also many human figures on the petroglyphs, and they are also predominantly black.

However, there are no other humans in these petroglyphs.

Scientists have studied these petroglyphs and generally believe that they were created 5,000-2,500 years ago.

Of course, there are also those who believe that humans inhabited the Sahara as early as 10,000 years ago.

Lu Yuan turned on the computer and compared the rock paintings he had found earlier with these murals.