The ore volume is not large.

One hand is just enough to hold.

Perennial feng shui sun exposure,

The surface is covered with dirt stains.

However, when placed in the sun, you can still see the hidden luster.

Faintly.

Radiant and shiny.

The metallic luster unique to this ore.

It's not something that ordinary pebbles have.

So.

Very easy to tell.

Common copper ores.

It is generally a mixture of sulfides or oxides of copper and other minerals.

It reacts with sulfuric acid to form blue-green copper sulfate.

Based on this generative characteristic.

Chalcopyrite is found all over the world.

The specific origin of copper ore.

It's complicated.

But at the end of the day.

Most of them are acidic rocks.

For a variety of reasons.

As a result of oxidation.

Olidia Island, where Lu Yu is located, meets this condition.

Because of the changes in the crust of the seabed.

This has led to a dramatic change in marine volcanic rocks.

The mountainous landform of the island has been formed.

Afterward.

After a long period of geological change.

Horn porphyry and fine jablite in the earth's crust are organically combined.

After a long period of oxidation, the ore is finally formed.

And so it goes.

It is not surprising that copper ore can be found here.

No surprises.

There should be a lot of them around here.

Ores of similar origin generally have a copper grade greater than 1%.

Although the quality is not the best, it is easy to smelt.

Hominids from the Late Stone Age.

It was from this most primitive and coarse rock containing copper sulfate that a variety of bronzes were smelted.

As a result, the productivity has been greatly improved, and human civilization has moved to a new level.

In the live broadcast room.

A group of water friends.

After listening to Lu Yu's words, he discussed it in the barrage without a word:

"Copper?"

"If only a gold mine were perfect!"

"Upstairs, what do you want?"

"Looking at Yushen's expression, I'm really afraid that he won't be able to control it, so he takes a bite hard, and then says: It's six times that of beef!"

"Haha, are you going to laugh at someone?"

"Visually inspect the high energy ahead!"

"I feel like the feather god is going to live again!"

……

Near the rocks.

There are a lot of similar ores.

Varies in size.

The shape is regular.

The copper content is also considerable.

And so.

Lu Yu didn't do anything.

It wasn't until all the ores suitable for smelting were collected that he explained to the audience in the live broadcast room:

"Why were the Eurideans able to build breathtakingly colossal stone statues in an era of limited productivity?"

"The reason is nothing more than that they have mastered the technology of smelting and can make tools that can be used. ”

"Although the texture of pure copper cutting tools is soft, if it is applied to production and life, it can also create a brilliant civilization. ”

"For the Olidians, metal cutting tools can boost their productivity. ”

"But for me, it's the same with the metal blades I have at hand. In order to deal with the hidden crisis, we must maximize our resources. ”

"Whether it's improving your quality of life or your own combat effectiveness, this is the foundation for you to survive when you're isolated!"

"So, it's time to show the real technology. ”

"Perhaps we can try to smelt pure copper from these ores in the most primitive way possible, and make some weapons and blades, if that happens, the efficiency of hunting will be raised to a higher level. ”

Smeared with a wooden arrow that sealed the throat with blood.

The lethality is not to be underestimated.

But compared to the bronze arrowhead, the penetration is still almost meaningless.

When I hunted wild boars by the river before, it was because I considered the penetrating power of wooden arrows.

That's why Lu Yu chose to go into battle shirtless.

At that time, if you had a copper arrow in your hand, you might not have to be so troublesome.

Powerful beautiful hunting, paired with metal arrowheads, even adult wild boars with rough skin and thick flesh are no longer a problem.

……

in this world.

The preconceived impression of metal smelting for the vast majority of people is still in the mechanized heavy industry.

Thought unarmed.

It is simply not up to such a high-end metal job.

Therefore, after listening to Lu Yu's words, the barrage in the live broadcast room suddenly increased.

Some are amazed.

Some are questioning.

I can't understand the mystery of primitive smelting technology.

"it!?"

"Anchor, are you kidding?"

"Do you want to make copper with your bare hands?"

"Cow break!

"Congratulations, Story: Stone Age mission has been completed!

"The anchor is about to enter the Bronze Age from the Stone Age!"

"The earthlings can't stop the feather god anymore!"

"I can't imagine it, it feels like the anchor is bragging, but I can't find evidence of it......"

……

Facing the audience's doubts, Lu Yu smiled indifferently.

And it didn't go to the heart.

Maybe for them, this kind of homework does sound a bit outrageous.

With just your hands, you can forge metal.

With such a sassy operation, how can those specialized smelters be embarrassed?

Of course, the audience can't be blamed for this.

In this era when primitive technology has long since died down and has not been noticed, it is normal for everyone to have this reaction.

But if you think about it, the reasons are not puzzling.

Back then, didn't primitive people also create all this when they were unarmed?

Why can't we, who also have higher wisdom?

In fact, as early as the late Neolithic period, humans began to experiment with the use of metal tools.

First copper.

Then there is the alloy of bronze.

After that, because there are suitable forging tools.

Iron also took root and became popular all over the world.

So far.

Human society has entered a stage of rapid development.

Until today.

But.

Speaking of which, smelting metal is really a big project.

Without professional knowledge and the corresponding equipment, it is extremely difficult to achieve.

Thereupon.

Place the collected ore in a bamboo basket.

Lu Yu casually found a shade to sit down, and finally opened his mouth unhurriedly:

"Everyone is right, smelting metal is not an easy task. ”

"But that doesn't mean much. ”

"The ancestors of mankind, as early as four or five thousand years B.C., acquired bronze. ”

"So, smelting metal may sound outrageous, but in fact, it's not as complicated as we think. ”

At this time.

After listening to Lu Yu's words, many viewers discussed in the barrage, how did primitive people learn to smelt copper?

This may seem like a simple question, but it's not.

There are a lot of knowledge points involved.

In other words.

In nature, primitive people did not seem to have the opportunity to experience the chemical phenomenon of ore melting at high temperatures!

Lightning fell, and fire was found.

Grilling food over a fire will make it even more delicious

If the clay is thrown into the fire, it will be fired into pottery.

Finally, here's the problem.

How did they discover and master such a difficult technology as metal smelting?

The audience was puzzled by this.

There are many theories.

Very technological.

Some say it was taught by aliens.

Others say it was an invasion of a higher civilization.

What's more, he even took out the Romance of the Gods.

It is said that there is a nose and an eye, and there is a matter.

It's speechless.

Leaning against the stone wall.

Lu Yu saw that the discussion in the barrage was in full swing, and he couldn't bear to interrupt.

After a while, I told the audience the ins and outs of this place.

"Brothers, interrupt you, the more you talk, the more outrageous it becomes. ”

"This question is actually very simple, and it is not as complicated as you think. ”

"Smelting, first of all, there must be fire, this is a must, as for how the fire was discovered, I have already popularized science to you in the previous live broadcast, after having fire, people will find that there are unexpected surprises when they use fire to burn something. ”

"Like food and clay. ”

"It's all a product of this point in time. ”

"I learned to use fire, mastered the use of fire to burn clay containers, and in the process, because the ore entrained in the clay was inadvertently thrown into the fire, fired and melted, people began to realize that the ore can be reduced to a harder metal, and it is more powerful than the stone tools in the hand!"

So people began to build earthen kilns, and learned to use charcoal and simple blowers, and copper was naturally smelted over and over again. ”

"Later, because of the emergence of centralized power to control large regions and populations, with a certain amount of manpower, people also got on the right track for metal smelting, and began large-scale production in the true sense of the word. ”

After mass production.

The soft texture of elemental copper can no longer produce the needs of life.

So.

A small amount of tin was added to it, and it became a copper alloy.

Here it is.

Primitive people completely bid farewell to stone tools and entered the Bronze Age in one fell swoop!

Under Lu Yu's explanation.

An easy-to-understand history of human development suddenly came to life.

666 in the barrage:

"6666, the anchor knows so much!"

"A conversation with you is better than reading a book for ten years!"

"Distinguished Professor of Wilderness University of Douyu TV!"

"Learned!"

"I like to listen to the story of the feather god the most!"

"A cross talk actor who was delayed by the extreme live broadcast......"

"Haha!"

……

A quarter past one o'clock in the afternoon.

The sky gradually became cloudy.

The scorching sun.

Obscured by thick clouds.

It makes the temperature in the forest a lot more comfortable.

In the sky overhead, a few seabirds will fly by from time to time.

Leaving behind a desolate and mysterious cry.

Rested for a while.

It's pretty much the same.

In order to return to the camp as soon as possible, Lu Yu put on his backpack and continued to set off west along the river.

As he was hurrying, he said as he went:

"If I didn't guess, Olidia's mineral resources should be very rich, not only brass, but also rare tin copper and copper. ”

"Because it is difficult to do such a complex engraving process with brass alone. ”

"In fact, half of the metal marks we found in the quarries were made of bronzes. ”

"Therefore, the clever Olidians must have possessed relatively developed smelting technology a long time ago. ”

"Speaking of which, it may be preceded by any ancient civilization in the world, which is unbelievable......"

Between words.

The light in the woods began to dim.

The terrain is steep.

Completely one-sided posture.

You have to be very careful.

Otherwise, it is very easy to stumble.

When it comes.

Lu Yu walked to the right bank.

Right now he's on the left bank.

Don't look at the fact that there is only one river separating us.

However, the scenery on both sides of the strait is very different.

Unlike the right bank, the terrain here is much steeper.

It's all very rough rocky formations.

It's extremely difficult to walk.

It took a long hour for the dirt to return to its feet.

Holding on to a tree, he took a breath.

Lu Yu wiped his sweat and was about to speak.

The eye was attracted by the black thing hidden in the bushes!

Seeing this, he took three steps and made two steps, and immediately rushed over.

Outcome.

No surprises.

Peel through the grass and take a look.

Sure enough, something was discovered.

It turned out that hidden under the grass was a huge, pitch-black, downward inclined cave!

The entrance to the cave is several feet square.

Enough to fit the next car.

There are a lot of green vines and mosses attached to the edges.

It looks a little vicissitudes.

The light inside the cave is poor.

I can't see my fingers.

I don't know where it leads.

And the most surprising thing is that there is also a long-eared stone statue at the entrance of the cave.

The long-eared stone statue is a mascot built by Olidia to protect the sun goddess.

So.

This inconspicuous cave should also have some unknown relationship with the Eurasian civilization......

"Brothers, there's a hole here. ”

"Next to the entrance of the cave, there is also a stone statue......"

As he spoke, Lu Yu stood in front of the cave and poked his head out to look inside.

But because the light is too poor, I can't see the specific situation clearly.

I only felt a gust of wind.

It's cold.

Alien to the sweltering heat of the jungle.

Secondly, there is a lot of humidity in the cavern.

There seems to be the sound of water inside.

Other than that, nothing else was found.

Standing in front of the cave, weighing it for a while, finally, Lu Yu opened his mouth again:

"This surface cave is very unusual......"

"There may be something hidden in ......"

Looking out at the dark cave.

Lu Yu put on a thoughtful expression.

In the end, I decided to go down and take a look:

"How about it, brothers, would you be interested in going down with me?"

“11111111”

"The hole must be drilled online?"

"Upstairs, I seriously suspect you're driving!"

“23333333”

"Is the hole wall drill okay?"

"Let's go to the Northeast to dig coal, stand for a ticket, and leave now!"

……

After receiving an affirmative reply from the audience, Lu Yu left the entrance of the cave.

Searched in the woods.

Cave exploration can be done without any equipment, but only torches are indispensable.

Even if you have a perfect lighting tool in hand, you can't do it.

The only way to monitor air quality without gas masks is to rely on torches.

Only in this way can the oxygen content in the cave be accurately determined.

There will be no accidents.

"Before I go in, I'll have to figure out how to make a torch that burns sustainably......"

"At the moment, we don't know anything about this cave, so torches are indispensable......"

Between words.

Lu Yu swept away.

At his feet he found several chestnut-shaped gray-brown tree nuts.

These nuts all fell from a tall evergreen tree next to them.

Seeing this, he hurriedly squatted down, picked up a few casually and put them in the palm of his hand, and asked the camera:

"In the live broadcast room, does anyone know this thing?"