History is a very important subject, and Lu Yun, who is a top student on Earth, naturally does not doubt this. So he listened very carefully, especially since this is the cultivation realm, the historical development of the whole world must be very different from the earth, and I don't know how many wonderful details there will be in it.

Bai Meizi said slowly: "In the study of this class, everyone must understand the ancient flood era of our cultivation realm, this era is related to the origin of our human race, and more importantly, how the human race survived in the ancient flood era, and what happened in the beginning to make the aura of this world so abundant." ”

Ancient Flood!

Lu Yun's eyes lit up when he heard this.

It's better than listening to a story, isn't it?

Hurry up and grab a small notebook!

Bai Meizi paused, looking at the serious attitude of the disciples below and was very satisfied, and then began to talk -

"The ancient flood stage, also known as the primitive stage."

"As you know, man does not jump out of a stone, and in the ancient flood stage, the earliest ancestors of our human race were actually ape-men who could walk upright."

Everyone: "!! ”

Who would have thought that the Terrans would be apes in the first place?

Immediately, a disciple from below asked, "Sir, our ancestors were apes...... Is there any evidence? ”

"This is natural," Bai Meizi smiled, "The powers of many sects have entered many forbidden places, and a lot of bones and hairs handed down from ancient times have been found in the forbidden places. The bones were almost identical to ours, except that they were much smaller than ours, about six feet tall on average. ”

Lu Yun: "!! ”

Is it so high?!

Six feet.

This unit of measurement Lu Yun has been tested - one foot in this world is almost equivalent to 25 centimeters on the earth, and six feet is equivalent to about one meter and a half!

That's not high!

Bai Meizi continued: "In addition to being much smaller than our height, the human race in the ancient flood era was covered with hair, and some of our sects were fortunate enough to take it back for some research, and the final result was that the strength of those hairs was basically equivalent to the hair strength of ordinary wild dogs now. ”

The disciples below were stunned.

They had never heard of this kind of knowledge in the world, so Mo Wushuang was born in a cultivation family, and he had been exposed to some of the things summed up in the cultivation realm.

Below, another disciple asked, "Sir, why are the ancient human race smaller than us?" Are they weaker than we are? ”

"That's right," Bai Meizi touched his gray beard, shook his head and said, "The ancient human race is much smaller than us, and its strength should be inferior to ours. According to research, the bone strength left by the ancient human race is much weaker than ours. The weapons they use are mainly various wooden sticks, and the clothes they wear are mainly various leaves and grass roots. In the ruins of the ancient flood era, we can often see the skeletons of some ancient giant beasts, and those giant beasts fought against our ancients, and the final result was almost a victory or defeat for each other. ”

Everyone: "Wow! ”

Of course, talking about this is actually just the beginning, and Bai Meizi smiled: "The ancient flood era is relatively old, about a million to 200,000 years ago. It's a pity that there was no writing at that time, so we can only guess about the living environment of the human race at that time. ”

Everyone nodded.

It's so far away that this can really only be guessed.

But obviously, Bai Meizi can't just talk about this thing, his real point is here!

Bai Meizi said: "Next, everyone pay attention, the next thing is the real key!" ”

Everyone hurriedly picked up their pens.

Bai Meizi said: "In the ancient flood era, although there was no text, there were a lot of stone paintings carved in many places, and those stone paintings were preserved, and we also deduced how the human race in the ancient flood era became our current human race." ”

He paused, then continued, "About 200,000 years ago, there were three suns in the sky! ”

Everyone: "!! ”

Lu Yun: "???? ”

it? Three suns?! This is not scientific! If there were three suns in the sky at the same time, the world would have been torn apart! That's the three-body system, the basic mechanical model of celestial mechanics.

In the general three-body problem, the equations of motion of each celestial body under the gravitational pull of the other two celestial bodies can be expressed as three second-order ordinary differential equations, or six first-order ordinary differential equations. Generally, the equation of motion of the three-body problem is an eighteenth-order equation, and 18 integrals must be obtained to obtain a complete solution.

Well, to put it simply, the trajectory of the three-body system is completely unpredictable, the three stars are near and far, and the huge gravitational force will destroy all the planets in the system!

So......

Lu Yun immediately asked, "Sir, did you drop two after that?" ”

"Huh?" When Si Chengzi heard Lu Yun's words, his eyes suddenly lit up: "Did this student guess?" ”

Lu Yun said with a smile: "No, I think that if there are really three suns in the sky, it will inevitably lead to an extremely chaotic state, and it is definitely impossible for our ancient human race to survive in that environment." So I speculate that there should be three suns, one large, two small, and two of the smaller ones should have not been around for a long time and fell quickly. ”

"Hahaha, the young man has some ideas," Bai Meizi suddenly laughed and said, "That's true." According to the records on the stone paintings, the sudden appearance of the two small suns fell not long after, causing a terrible disaster at that time, but later, after about 2,000 years, the world finally gradually recovered. ”

Lu Yun hurriedly recorded and began to speculate at the same time.

The two little suns should belong to the category of meteorites, but they may be relatively large, and it is unknown where they came from, and then they happened to be seen by ancient humans.

After that, two meteorites smashed on the ground and caused a huge disaster, and the surviving humans survived.

Theoretically, that's how it should be.

Continue listening.

Bai Meizi smiled and said, "Then something terrible happened." After those two suns fell to the ground, the world's species changed dramatically in the two thousand years that caused the catastrophe. You may not understand this, but I'll give you a simple example, that is, the beasts in the ancient flood era were not very large, and in those two thousand years, countless beasts have greatly improved in size, and at the same time, their characteristics have also changed dramatically. ”

As he spoke, he took out a magic weapon for video recording, and soon a video came out of it.

It was the skeleton of a wolf, and it was a very large wolf, almost a man and a half tall when it stood, and the wolf had a single horn on its head, and its claws were extremely sharp.

Bai Meizi said: "This is a wind wolf in our current world, its speed is very fast, and it can also send out aura attacks. And this one is also a close relative in the ancient flood era, but the body size is much smaller than it, about four feet tall. ”

Hearing this, Lu Yun immediately touched his chin.

It's kind of weird.

He has studied the theory of evolution, and generally speaking, the evolution of species must take a long time to accumulate.

I have never heard of a species that has changed so much in just a few thousand years.

So, this change must be because of those two suns?

Sure enough, Bai Meizi said: "Later, according to the research of the great powers of our sects, the final results all pointed to those two suns. In other words, all changes in this world come from those two suns. ”