“So, have you ever noticed that they use bronze or iron?Do they have a means to smelt metals?”Another scientist asked.This is to ask about the progress of the scientific and technological development of indigenous civilizations.

The smelting of the bronze is slightly less difficult, the minimum temperature required is about 800 degrees Celsius, only need ordinary carbon fire, these indigenous lizards have a little hope.Even in some natural copper mining areas can also find a small amount of copper alloy material.

The smelting of iron is more difficult, it needs a high temperature of more than 1,100 degrees, and special stoves and ventilation methods must be specially made.So it’s just a matter of course, and scientists have little hope.

Of course, the prerequisite for smelting metals is that they can make a fire!

Without fire, everything is free, and it is impossible to smelt with magma, right?

According to the current sociology of mankind, ancient scientific and technological trees are: language, writing, fire, pottery, animal husbandry, planting, bows and arrows, copper smelting, irrigation and so on.

These technologies are still slightly sequential, and it is not known how much these lizard natives lit up.

Captain Wu Hao heard the problem and suddenly froze again.

As the topic deepened, the inquiries of this group of scientists became more and more detailed and more inclined to detail.But they did not pay attention to these things at that time, how can they answer?

This time the problem, and the eight soldiers were still in trouble, and they could only sit around and discuss it again.

"...those spears should be made of wood-like plants, and should not be metal!"There doesn’t seem to be any copper on the spear, does it?”

“No, there is no metal...”

When they fall into the trap, the inverted thorns inside should not be made of metal, but a hard wood fiber wedge!

Then... during the fight between soldier Leo and the lizard, he did not hear the crisp sound of the metal collision, as if there were, these eight people should have been impressed.

Wu Hao looked at the few people around him, even Leo also shook his head, he was stabbed several times by the spear, the sound should not be metal...

So, this group of lizard people should not have invented copper smelting, they can not cast copper?

Before Wu Hao could finally speak, another young soldier seemed to remember something and shouted out urgently: "Yes, there is metal!"

"They took a very curious look at the giant worms as they were dealing with the giant worms."

"Because the flesh of this bug is very strong, there are a lot of insect shells on the surface of the same bit of the tectonic, even with our power armor saw has a silky sense of obstruction."So I’m very curious about how they cut...”

“As a result... I saw a strange piece of round metal!”

"How to say, is a round metal sheet, no handle, there are thorns like saws on the edge of the metal, very sharp!"The soldier’s eyes looked up, looking a little nervous.

“No!”

Just after the voice fell, another scientist immediately said with suspicion: "Even if they can smelt copper and can build cutting knives, it is impossible to be round?"

“Are you sure you don’t really have a handle?”The round cutting tool is not easy to use at all, which is unreasonable!"

"And ... the manufacture and difficulty of the outer frame saw of the copperware, and the difficulty of invention, should not be able to get them in this era?"Think about it, are you wrong?”

The scientist asked questions, pointing out the loopholes in the soldier's memory.

In fact, the credibility of human memory is not high, often wrong, and sometimes add some information that they have speculated.

This ambiguity, in particular, is recalled to the error rate at a higher rate, so many scientists doubted the words of these soldiers.The final information still needs to be confirmed after their underground investigation.

The soldier was red-faced, and now he thought it was incredible.

The circular cutting tool looks like a cutting gear of a cutting machine, and there is really no handle.

Is it really wrong to remember?

But he thought for a long time, and really remembered what he saw.I was very curious to confirm it again... Yes, that’s it!

“I...I remember!”

Suddenly, soldier Leo shouted, “The lizard...the leader of the lizard, the lizard man, the lizard man, the lizard man, looks like something hanging around his neck, and it’s like it’s a local, it sounds like metal...it seems to be!”

He finally remembered now, and shouted in a hurry.

But the memory was very vague, and he wasn’t quite sure.

This problem can be solved by looking back at the video, and then, the video is more or less photographed by the leader of the lizard.

Everyone rolled their eyes and began to play the video anxiously, and then entered with 8 times the speed.

Although everyone here has carefully watched the video many times, it is not surprising that everyone thinks that it is a hanging ornaments such as bones.

Did you know it was metal?Really fake?

This video is all shot in the night vision environment, almost can be said to be black and white video, so it is impossible to see the original real color of the object.

Ignoring something is normal.

“Wait, just start here!”

Yu Yifeng shouted loudly, and the speed of video playback began to return to normal.

The lizard leader on the camera swung his body, seemingly in a very excited state.It took a piece of worm meat handed over by its subordinates, smelled it carefully, and then hung it satisfactorily on its chest...

It is their tribal tradition, the best meat, and of course to be given to strong chiefs!

Of course, such a large worm, at least three or four tons of weight, enough for the whole village to enjoy for a while, basically everyone can share.

The most important thing is that they have no dead people, which is also the most satisfying point of the lizard leader.

Thanks to these strange and powerful creatures, are they really the messengers of the gods?

Then the lizard leader's camera is like this, and there is no particularly useful thing, because the ornaments in front of its neck are blocked by a piece of worm meat...

“Go ahead and put it back!”

It does not mean that Yi Feng speaks, and the Minister of Security, Xu Yunjin, has shouted out urgently.

The video is replayed little by little, from the leader of the lizard to take the meat, and then the meat to fly back to the hands of the subordinates, at this time finally jumped out of a clear thing!

In an instant, the hearts of people jumped to the throat!

Everyone can see clearly, a... a hexagonal nut?

No, more than one, three!

“Increased the picture!”

Yu Yifeng said somewhat incredulously.

How is it possible!How did modern steel nuts emerge in primitive societies?

This is too contrary, like a human watch appeared in the fossils of the dinosaur age!

Or maybe a bone like a nut?This is more likely!

Under the commissioning of a technician, the image slowly gets bigger.

The camera of the new human civilization is still good and the resolution is very high.Even if the image is enlarged several times, it is only slightly blurred, and it can still be seen clearly.

These three round pendants are really very, very like nuts, and they are hung around their necks like lizard leaders as ornaments!

“Increase the picture ten times!”Yu Yifeng said.At the same time, his heart pounded, and a strange feeling appeared in his heart.

Yes, inexplicably, is it inexplicable, is it not the screws left by humans, and they can't be picked up?

After a few seconds, the result came out.Because of the image resolution limit, there are blurry pixels like snow spots.

But the shape of the hexagonal nut is becoming more and more obvious, and even people see the thread of the circle in the center ring!

This is undoubtedly a metal nut!

Small finger size!