In the live broadcast room.

A group of sailors stared at the small fruit in Lu Yu's hand and looked at it for a while.

Didn't even guess the punctuality.

In the end, they said that they had not seen it.

Seeing this, Lu Yu chuckled twice, organized the language, and explained:

"Guys, this is actually a nutty ......"

"The scientific name is Queensland chestnut, some people call it macadamia nut, and Chinese people like to call it macadamia nut. Well, this name should be familiar to everyone, right?"

"But in reality, the original origin of this thing is not Hawaii at all. ”

"The reason why it's called this name is a complete gimmick. ”

The wild macadamia nut is an evergreen tree.

Dicotyledon.

The canopy is tall.

Prefers to grow in mild, moist places with little wind.

Ripe macadamia nuts are not only extremely nutritious, but also known as the "king of dried fruits".

At the same time, the kernels are also very oily.

Extremely flammable and burn-resistant.

In the wild, macadamia nuts are the perfect choice for making torches and field lighting gear!

Until today.

A primitive aboriginal living in the northern rainforests of mainland Australia.

It is still customary to use Queensland chestnuts to make torch lighting.

How to make a nut torch.

It's very simple.

Choose large ripe nuts and pass them on on skewers or branches.

Then light it with fire.

High-quality and ripe Queensland chestnuts can continue to burn for nearly two or three hours, which is very powerful.

The most important thing is that it doesn't work hard at all.

Make it anytime, anywhere.

There is no need for too complicated materials.

"There are many different types of Queensland chestnuts, and the one we picked up was very different from the ones that are processed and sold in the usual market, and although they can be eaten, the taste is not as good as expected. ”

"So, don't think I've picked up something really good, these macadamia nuts aren't meant to be eaten, they have a bigger purpose......"

"Queensland chestnut, full of oil, is a good material for making torches, and the aborigines living in Australia are still using this method to make torches, because it is simple and not so cumbersome, compared to beeswax torches and pine lanterns, nut string torches, it is definitely the best choice for lighting needs during the expedition. ”

When explaining to the audience.

Lu Yu was not idle.

Take out a piece of ore from the bamboo basket, smash all the nut shells you have picked up, and remove the kernels inside.

Just look at it like this.

The kernels of Queensland chestnuts are almost identical to the macadamia nuts you normally eat.

It makes almost no difference.

But in fact, without a long period of drying and stir-frying, the taste is not much better.

I was busy for a while.

Lu Yu put all the nuts aside, touched a pale green branch that was quite straight from the ground, and then said to the camera:

"Alright, now it's just a matter of skewering the nuts on top of this, a special nut string torch. ”

"It should be noted that the main body of the torch must be made of new branches. ”

"The reason, I have explained to you many times, is nothing more than to increase the burning time of the torch, remember, don't use those dead branches, otherwise there is likely to be a farce of playing with fire and self-immolation......"

"Li Shizhen's skin!"

"Is it okay to play with fire and set yourself on fire?"

"Haha!"

"Damn, I want to see it, and I'll show you the big guys?"

"Don't talk about it!"

"Sooner or later, laugh to death in the entertainment!"

After skewering the nuts in turn.

Lu Yu untied the tinder box on his waist and casually found some ignition objects.

A fire was lit.

Light the torch.

Soon.

After two or three minutes, until the nuts on the wooden skewers were fully burned, he removed the torch from the fire.

"Brothers, I have said it more than once. ”

"Torches are more than just lighting. ”

"More importantly, it can avoid a lot of unnecessary risks. Therefore, before caving in the field, everything can be ignored, but fire ...... cannot be ignored."

Picking up the backpack, Lu Yu held a string of nuts and torches, and strode towards the entrance of the cave.

"In the 17th century, mine workers discovered that canaries were sensitive to gas. Even if there is even a very small amount of gas in the air, the canary will stop singing. ”

And when the gas content exceeds a certain limit, although the reckless humans are unaware, the sparrow has already been poisoned and died.

"At that time, under the relatively rudimentary conditions of mining equipment, the workers would bring a canary as a 'gas detection indicator' every time they went down the mine, so that they could evacuate urgently in a dangerous situation. Right now, we're in a similar situation, this little string of nuts is my canary, and if it goes out, I'll have to get out of the cave anyway. ”

"666, something!"

"I don't know what to think of, the ghost blows the lamp!"

"People light candles, ghosts blow out lamps, holes must be drilled, and feathers are not spared!"

"Haha!"

"It's up, the live broadcast of the feather god is really full of dry goods!"

"Truth is in the details!"

"The torch is on!"

……

The movement of the cavern.

All the way down.

After stepping into the hole.

The long-lost chill is rushing towards you.

Hair all over the body.

In an instant, he stood upright.

The temperature here.

It's at least two notches lower than the outside.

Thanks to the bonus of [Chill Bloodline].

Otherwise, just this one grass skirt.

It's hard to resist.

During the exploration, with the flickering firelight, Lu Yu observed the inner wall of the cave.

It was found that there were traces of artificial excavation all over it.

It seems that I guessed correctly.

This cave is also believed to have been made by the Olidians.

In addition to the rock wall, the road under your feet is also unique.

Not big, not too small.

It's just a gentle slope of 45 degrees.

Straight to the endless dark abyss.

There was a strong cold smell in the air.

Smells.

Very uncomfortable.

……

The inside of the cave is full of large and large pieces of rubble.

There are many kinds of things.

It's rugged and diverse.

Some are as small as goose eggs, while others are as large as ores.

I don't know if it's natural.

Someone did it on purpose.

In short, it's weird.

After walking for a while.

The wind inside the cave was getting stronger and stronger, and the flames on the torches began to flutter.

Seeing this, Lu Yu hurriedly protected the flames, and then said:

"Friends, this is a man-made cave, and the traces on it are still clearly visible. ”

"It's very rough. ”

"It seems that it should have been the work of the original blade, and it has nothing to do with the pirates of Lybotaria. But the question is, why did the Olidians dig such a big cave, and is there any point?"

Tsai carefully observed every detail of the cave.

Lu Yu said thoughtfully.

There are many doubts in my heart.

It is always incomprehensible.

In any case, the project of digging a cave is much more time-consuming and laborious than carving a stone statue.

With the level of productivity at that time, I am afraid that such a large cave would have to be dug for several years......

What do these people want to do?

Is it a tunnel war?

Stop.

It's really possible.

According to the temple frescoes, at the end of civilization, Olidia suffered several large-scale invasions, and the entire tribe was severely affected.

Faced with this situation, it makes sense that the ruling class of the clan has exhausted its efforts to create a refuge.

But.

It's just a matter of saying.

What is this underground cave used for?

It's still unclear.

The only way to find out the ins and outs of this is to keep digging deeper and find out.

Place the torch in front of you.

Lu Yu thought wildly as he continued to walk deeper into the cave.

Soon.

That's more than ten minutes of work.

The ramp underfoot, there is a turnaround.

It's getting more and more flat.

And at this time.

There was also a sudden opening in front of me.

A larger cave running north-south suddenly came into view without warning!

In the middle of the cave, there is a turbulent underground river that rushes through it.

The river channel is wide.

The water level is also deep.

Compared to Yamauchi, it is not as good as it.

Most of the sound of water I heard before came from here.

See this scene.

Lu Yu frowned, took three steps and two steps, and walked straight over.

"Ladies and gentlemen, there's an underground river here, too. ”

"I want to come. ”

"It should also be one of the ...... of Olidia's vast underground water system"

Raise the torch.

With the faint light, Lu Yu carefully surveyed the cave around.

This cave is by no means artificially mined.

Rather, it is eroded by river water.

Naturally occurring.

As it stands.

The Olidians struggled.

The purpose of digging underground caverns.

Eight achievements are trying to get through here.

But what is it for?

Do you want to find the Dark River?

What do these people want to do?

Thinking about it, Lu Yu shared the doubts in his heart with the audience in the live broadcast room.

He also expressed his opinion.

But everyone discussed and discussed, but never got a more reliable answer.

In order to figure out all this, Lu Yu expanded the scope of his search.

to your right-hand side.

That is, the upstream of the river, I searched for it.

Outcome.

I really made a discovery.

On both sides of the river, Lu Yu found many primitive bronze utensils.

Copper axes, copper adzes, spears, stone chisels.

There are even many bottles and cans made of clay and countless broken fragments on the ground.

The surface is covered with cobwebs and moss.

It's long gone.

Looked at it for a while.

Lu Yu casually picked up a fragment from the ground, put it in his hand and weighed it twice.

Nothing special.

It's a very ordinary utility.

"There are traces of human life in the cave. ”

"There are production tools and life utilities everywhere on the ground. These utensils are very simple containers and cutting tools. ”

"In a primitive society where science and technology are not developed, similar tools can already meet the initial needs of production and life, and if I guess correctly, the Olidians should have survived in this cave for a while. ”

"But the question is, why do they burrow underground?"

"Could it be that you're really playing tunnel warfare, right?"

Lu Yu looked at the camera and raised his eyebrows in disbelief.

……

In fact.

Whether it is a primitive society or a modern one, when fleeing war, people always like to run underground.

Similar ancient war tunnels were very common in Europe and Oceania.

In 2015, German archaeologist Heinrich Kush discovered a large number of underground tunnels in dozens of Neolithic human settlements in Europe, all of which were left over from tribal wars.

In modern times, the most famous thing may be the Guzhi Tunnel in Yuenan.

During the Vietnam War, the Cu Chi Tunnel was a very difficult place to conquer.

During the war, due to the fact that the United States had dropped bombs and sprayed defoliant several times, people had to hide underground and conduct guerrilla warfare.

The Viet Nan soldiers once controlled the area through a tunnel system that seems legendary to modern people.

A war tunnel about 250 kilometers long with all the infrastructure is complete.

It presents a history of blood and sweat against foreign forces.

At that time, Lao Mei naturally knew about the existence of this tunnel.

However, due to the complex structure of the tunnel, it was impossible to correctly grasp the whereabouts of the army, and it was still impossible to capture it until the end.

In this way, it is possible that the Olidians of the Stone Age may have been forced to choose to open up this place in order to survive the war.

Although there is also this possibility, Lu Yu always feels that there is a problem here.

Among them, the biggest problem is that after searching for so long, he hardly found any weapons.

As a refuge.

No weapons.

It's a bit out of the ordinary.

Can be for a while.

No strong rebuttal point could be found.

So, I had to give up first.

……

Walked almost four or five hundred meters upstream of the river.

But in the four corners, except for the bottles and cans that can be seen everywhere and various production tools, there are no more valuable clues.

So, after resting in place for a while, Lu Yu returned.

Continue downstream.

Along.

It may be due to the topography that causes the flow of the river to be extremely intense.

Blazing fast.

It's not hard to see why.

The terrain of the north shore is inherently high.

The drop is also huge.

With such a gap, on the way back, Lu Yu had already been taught.

Affected by this, the dark river in the cave is naturally surging.

It's blazing fast.

Judging from this flow rate, the current water level should not be the peak.

When the rainy season arrives, the place will change dramatically as the groundwater rises.

The water level rose by a meter and a half.

No more at all.

After some observation, it turned out that Lu Yu's analysis was really correct.

The inner wall of the cave is indeed very obvious traces of erosion.

Seemingly.

When the water level peaks.

There should be no problem at all when the river overflows the banks.

If only it had come then.

The cave must have been a different story.

With the sound of rushing water.

While chatting with the audience, Lu Yu held a torch and walked cautiously downstream.

Between words.

Less than a cup of tea.

Ahead.

A pitch-black "behemoth" suddenly appeared in view!

What's the situation?

The light of the torches.

Very little.

Wobbly and swaying.

No matter how wide Lu Yu's eyes were, it was still difficult to understand the reason.

It's even more indiscerning.

"Things" are dead or alive!

But no matter what, standing in the dark for no reason is such a "thing", which makes people feel a little empty!

Meanwhile.

The other side.

didn't wait for Lu Yu to speak, the audience who had always been in front of the screen also clearly saw this mysterious scene!

have said.

It's too scary!

Dark caves.

Faint firelight.

Motionless unknown!

It's scary to think about!

These elements come together.

Plus the current situation.

Suddenly, the atmosphere in the live broadcast room became tense for no reason!