However, the light in the next room quickly dimmed again.

This seems to be a sign of what is to come.

It turns out that most of the large mammals, such as the mammoth and the saber-toothed tiger, have also been devastated by human activities, the cradle of humanity has gradually grown out of the Sahara Desert, and the forerunners such as the Neanderthals, who were lucky enough to escape the ice age, have been cleaned up.

"Why did this cradle of humanity become the Sahara Desert?" Xiao Zhen hurriedly asked.

"This, I guess may have something to do with ice age activity, at first the melting of the glaciers may have been able to irrigate the entire Sahara Desert area, but then the ice age ended, a large number of glaciers disappeared, and the inland area in the middle of the equator naturally lacked water, so eventually desertification. Lao Wu thought about it and said.

"This is incredible, isn't it? What was the earth like during the ice age? How can melting glaciers irrigate the hottest place right now?"

"It's just a guess, this ice age world, a lot of water in the form of huge glaciers covered the land, so the sea level may be very low, so it is possible to walk through the Bering Strait and some other shallow seas. Lao Wu thought about it carefully and said.

"Well, cover most of the continent with a layer of ice like Antarctica?" asked Xiao Zhen.

"I don't know exactly what happened, but I can guess as much as I like, and of course, in the near future, scientists may give the right answer. Lao Wu thought about it and said.

Walking into the exhibition hall at the back, the content on display is becoming more and more complex, and more and more cultural relics have been unearthed.

Xiao Zhen no longer saw simple and rough stone tools, and the stone knives on display in the next exhibition hall became sharper and sharper.

A wide variety of tools, pottery and photographs of frescoes are displayed on the exhibition stand under a glass frame.

On the main picture in front of you, scene after scene seems to be a variety of new strife - all kinds of ancient giant beasts have disappeared one by one, and there is no longer harmony between the races that originally united to capture giant beasts......

However, the various tools seem to be getting more and more refined in the process.

The pottery gradually changed from rough clay pots to patterned clay pots and handicrafts of various shapes, and the body became more and more refined.

A variety of other items have also appeared, and it is dizzying to see the small real thing.

The emergence of grain cultivation seems to be another epic process, but the main line of the exhibition shifts to the middle and lower reaches of the Yellow River.

The Fusiliers' drilling wood for fire is undoubtedly the most attractive thing next.

In the museum's simulation laboratory, Xiao Zhen tried to drill wood to make fire.

However, due to the small real strength, it was not possible to complete this simple experiment.

In the end, only two bubbles were ground on the immature fingertips, and there was not even green smoke in the middle of the wood.

"Dad, you can try. Xiao Zhen said.

So, Lao Wu took a lot of effort to finally let wisps of green smoke float out of the dry branches.

Looking at the wisps of smoke wafting out, Xiao Zhen looked thoughtful.

However, there are not many exhibition halls left, and Xiao Zhen is becoming more and more curious about what this exhibition will end with in the end.

In the Yangtze River and Yellow River Basin, with the emergence of ancient sages such as Youchao, Suiren, and Shennong, human beings are no longer just out of Africa, and the road to real civilization has finally opened.

Finally, the softly lit room turns back to the world map.

Under the light of civilization, the four ancient civilizations that were finally piled up are the center of this exhibition hall.

Looking at the pyramids of Egypt, the hanging gardens of ancient Babylon, the Taj Mahal and the Great Wall of India on the huge map, Xiao Zhen is very excited.

At the same time, the museum's exhibition has come to an end.

Xiao Zhen suddenly had a feeling of lingering. I wanted to go back and revisit it quickly, but I found that there was no turning back - and this exhibition hall seems to have been deliberately changed to a one-way design.

This also seems to mean that there is no turning back for either the first four-limbed and five-fingered hominid, the first Australopithecus australopithecus to stand up, and hominids between Africa and Asia.

Only by constantly moving forward can we gradually step out of a new world.

Walking out of the museum, it was already dark.

As night fell, on the No. 666 bus, Xiao Zhen suddenly asked Lao Wu: "Why did the Kenong Mannon people who came out of Africa want to kill those Neanderthals?"

Listening to Xiao Zhen's words, Lao Wu suddenly remembered the precious extracurricular book "The Origin of Species" given by his grandfather when he was a student, so he said, "How can I say this, it can't be regarded as a kill." In general, it is also a kind of competition of survival of the fittest. As Darwin's "Natural Selection" describes, it is so cruel. ”

"So the mammoth and the saber-toothed tiger will go extinct?" asked Xiao Zhen again.

"Yes, not just mammoths and saber-toothed tigers, but dinosaurs and Neanderthals and all those 'failed' explorers and so on. Lao Wu said.

"Lost the battle with Homo sapiens, so all of this is out?" asked Xiao Zhen.

"That's pretty much it, after all, in the beginning, it was all about gathering and hunting. So, wherever you go, there will be new gathering and hunting grounds. And when there is not enough food, there will naturally be more disputes. Lao Wu carefully considered the words.

"That is, this is to survive?" asked Xiao Zhen.

"Yes, to survive. Lao Wu stuffed a betel nut into his mouth and said.

"It's time to get off, it's so dangerous, I almost got on the station. Lao Wu pulled Xiao Zhen to the back of the 666 bus and said.

When I got home, I finished eating, and after watching "News Network", Xiao Zhen shared these with my grandparents.

Grandma smiled and said, "Haha, my memory is not bad, the process of the origin of the human race has been figured out, and I am considered to have a long knowledge, haha." ”

The grandfather, who was born in biology, said from a more professional direction: "Come on, what you talk about, bullshit." How easy is it for this man to come out of Africa? Do you know how cold the ice age was?"

Xiao Zhen naturally opened his mouth in an O-shape.

Grandpa continued: "While this success out of Africa is inspiring, the road out of Africa is made up of bones from millions of years of explorers. The so-called 'thousands of sails on the side of the sunken boat, and ten thousand trees in front of the sick tree. Human beings have gone through a lifetime of death before they have managed to travel to every corner of the world. ”

"Is this so exaggerated?" asked Xiao Zhen.

"The reality is cruel, and going out of Africa was fatal for early humans, after all, during the ice age, outside the tropics, the winter was very terrifying, and the hunger and cold were deadly. Grandpa thought about it and said.

Xiao Zhen nodded, and asked again, "Then how cold is this ice age?"

"Most of the world feels like Antarctica, with thousands of miles of ice and thousands of miles of snow. Mild weather occurs only below the warm temperate zone and near the equator. However, I don't remember the textbooks for so many years, and the current textbooks may be different. Grandpa thought about it and said.

"It was precisely because of the large amount of ice on the continent that the sea level was much lower than it is now, so it was easy for humans at that time to cross some places that now look like moats and reach places that are not easy to imagine when looking at the world map now. For example, the American continent and New Zealand. Grandpa continued.