"So, have you ever found them using bronze or iron? Do they have the means to smelt metal? Another scientist asked. This is to inquire about the progress of scientific and technological development of indigenous civilizations.

The smelting of bronze is slightly less difficult, the minimum temperature required is about 800 degrees Celsius, and only ordinary carbon fire is needed, and these indigenous lizards still have some hope. Even small amounts of copper alloying materials can be found in some natural copper mining areas.

The smelting of iron tools is more difficult, requiring a high temperature of more than 1,100 degrees, and special furnaces and ventilation methods are required. So it's just a passing question, and scientists have little hope.

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

Without fire, everything is for nothing, and it is impossible to smelt with magma, right?

According to the current sociology of human beings, the scientific and technological trees of ancient times include: language, writing, fire, pottery, animal husbandry, planting, bow and arrow, copper smelting, irrigation, and so on......

These technologies are still slightly in order, and I don't know how much of these lizardfolk natives have lit up.

Squadron Leader Wu Hao was stunned again when he heard this question.

As the topic deepened, the group of scientists' inquiries became more and more detailed. But they didn't pay attention to these things at the time, how could they answer?

This time, the question stumped the eight soldiers again, and they could only sit around and discuss it again.

“…… Those spears should be made of wood-like plants, not metal! The tip of the spear doesn't seem to have copper, does it? ”

"Yes, there is no metal ......"

When they fall into the trap, the barb inside is not made of metal, but a kind of hard wood fiber wedge!

And then...... During the fight between the soldier Leo and the lizardmen, there was no crisp sound of metal colliding, as if there was a real thing, and these eight people should have an impression.

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

So, the lizardfolk shouldn't have invented copper smelting, and they couldn't cast bronze objects?

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

"I also took a curious look at them while they were dealing with giant bugs."

"Because the flesh of this insect is very strong, and there is a lot of chitin like insect shells on the surface, even with the chainsaw of our power armor, there is a slight sense of obstruction. So I'm very curious about how they cut ......."

"The result...... Saw a peculiar round piece of metal! ”

"How to say it, it's a perfectly round piece of metal, without a handle, and there are saw-like barbs on the edge of the metal sheet, which is very sharp!" The soldier's eyes were upward, and he looked nervous.

"That's not right!"

As soon as the words fell, another scientist immediately spoke suspiciously: "Even if they can smelt copper and make cutting knives, they can't be perfectly round?" ”

"Are you sure there really isn't a handle? The round cutting tool is not easy to use at all, which is unreasonable! ”

"And...... The manufacture of the outer frame of bronze and the difficulty of invention should not be something that they could have figured out in this era, right? If you think about it, are you mistaken? ”

The scientist asked questions again and again, pointing out loopholes in the soldier's memories.

In fact, human memory is not very credible, and errors are often made, and sometimes some of the information that is conjectured by oneself is added plainly.

Especially when it comes to such ambiguous details, the rate of error in recall is even higher, so many scientists are skeptical of the words of these soldiers. The final information will need to be confirmed after they go underground to investigate.

The soldier's face turned red, and he thought about it now in disbelief.

The round cutting tool looks like the cutting gear of a cutting machine, and it really doesn't have a handle......

Could it really be that I am mistaken?

But he pondered it for a long time, and he did remember that what he saw was like that. At that time, I was very curious to confirm it...... That's right, that's it!

"I ...... I remember! ”

Suddenly, the soldier Leo also shouted: "That lizard...... The leader of the lizardmen, the lizardman seemed to have something around his neck, jingling and sounding like metal...... It seems to be! ”

He finally remembered it now, and hurriedly shouted.

But the memory is very vague, and he is not very sure.

This problem can be solved by looking back at the video, and no matter what, the video still captures the lizardman leader......

The crowd's eyes widened and they began to play the video anxiously, then fast-forwarded at 8 times the playback speed.

Although everyone in the room had watched the video many times, they subconsciously ignored what the lizardman leader was hanging around his neck...... Everyone thought it was a bone, but there was nothing strange about it.

Unexpectedly, it turned out to be a metal material? Really?

This video was all shot in a night vision environment, and it can almost be said to be black and white, so there is no way to see the original true color of the object......

It's normal to ignore something.

"Wait, it's all over here!"

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

The lizardman leader on camera is swaggering and shaking, seemingly in a state of great excitement. It took a piece of insect meat handed over by its subordinates, sniffed it carefully, and then hung it on its chest contentedly......

This is the tradition of their tribe, and the best meat, of course, must be given to the strong chief!

Of course, such a large insect weighs at least three or four tons, which is enough for the whole village to enjoy for a while, and basically everyone can get it.

The most important thing is that they don't have dead people, which is also the most satisfying point of the lizardman leader.

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

Then the lizardman leader's shot was like that, and nothing particularly useful was filmed, because those ornaments around its neck were blocked by a piece of worm meat......

"Replay a little bit forward!"

Before Yi Feng spoke, Minister of Security Xu Yunjin had already shouted out in a hurry.

The video was played back little by little, and the piece of meat was taken from the leader of the lizardmen, and then the piece of meat flew back into the hands of his subordinates, and at this time something finally jumped out!

In an instant, everyone's hearts jumped to their throats!

Everyone saw it clearly, a ...... A hexagonal nut?

No, not just one, it's three!

"Enlarge the picture!"

Yu Yifeng said with some incredulity.

How could it be! How did modern steel nuts appear in primitive societies?

It's so inconsistent, like a human watch from a fossil from the age of the dinosaurs!

Maybe it's a nut-like bone? This one is a bit more likely!

Under the debugging of a technician, the image slowly became larger.

The cameras of the new human civilization are still good, and the resolution is very high. Even if the image is magnified several times, it is only slightly blurry, and it can still be seen clearly.

These three round pendants are really, really like nuts, and they are hung around the neck as ornaments by the lizardman leader!

"Enlarge the picture ten times more!" Yu Yifeng said. At the same time, his heart was beating wildly, and an inexplicable feeling appeared in his heart.

Yes, it's just inexplicable, could it be that the screws left by humans somewhere were picked up by them?

After a few seconds, the results were in. Because of the limit of the resolution of the image, blurry pixels like snowflake dots appeared.

But the shape of the hexagonal nut became more and more obvious, and even people saw a circle of threads in the center ring!

This...... Metal nuts without a doubt!

The kind the size of a little finger!