My name is Yan Shunlu, and in the time just now, I and a group of experts have seen two ancient human societies under the explanation of Goliath, which has opened a door to the unknown, and also made me more curious about the third civilization that will appear next.

Goliath suddenly paused and said with a little hesitation, "Of the four human societies we left behind through the mouth of the Mayans, this one is the strangest, and we call this civilization the Tarada civilization. We seem to know them, but we are strange to them, because this civilization disappeared so suddenly, and left almost no trace of existence, as if it had never existed. ”

"And how did you know they existed?" Finally someone else started asking.

"It's because they've left us a piece of information, as if they knew they were going to disappear. That's it. With that, Goliath took out a book from the box.

It is said to be a book, but it is more like five pieces of metal, stacked thickly on top of each other, bound like a book with hinges on one side, and can be turned over from the other side. There are several pattern-like patterns on the cover, which should be some kind of text, which is the title of the book. There is also a hollowed-out circle in the middle, and in the circle there is another vortex that seems to be half unscrewed, and a huge cross crosses diagonally through the circle.

Everyone here showed curious eyes, and it was okay to say that these few pieces of metal were books, but the key was that everyone couldn't understand the text on them, so they still pinned their hopes on Goliath's explanation.

"This can be said to be a book, or it can be said to be a puzzle, and only by solving the puzzle can you turn the next page and see what is written inside. Therefore, it is mentioned in the packaging instructions of this book, this one is made of a special alloy that will hardly corrode, so it is still as bright as new after so many years of preservation, and at the same time, in order to prevent it from being opened by other creatures, this setting was made. Goliath said, pointing to the pattern on it.

"One mechanism after another, only highly intelligent beings can open this book and read its contents. At the same time, another protective measure was made, and if it was violently dismantled, then the book would be automatically destroyed. So to read this book, you can only follow their rules, solve the puzzles, and read page by page. ”

"I didn't bring the packaging for the book, it was a sealed box, made of the same material, locked with a trap lock." Goliath elaborated further.

"The book was made about 400,000 years ago, and thanks to strict precautions, it still looks like it was just finished."

"Wait, just now you said that you recorded them, but you said that you didn't gain anything, isn't it contradictory?" I interrupted Goliath's introduction.

"Yes, before the book was discovered, and it wasn't until we unraveled the book that we found some clues based on the above account. That's what we have to say about this civilization. Goliath said flatly.

Well, the question was perfectly rounded by him, and there seemed to be no loopholes, and I motioned for him to continue, and the other experts didn't ask any other questions, some were taking notes, and some were just quietly watching Goliath.

"This book doesn't explain it, and you can only solve it by relying on wisdom to find the trick." After saying this, Goliath moved on the cover of the book, and every one of his movements was so clear, as if he was deliberately trying to show it to everyone.

After about three minutes, I heard a soft 'click', and Goliath said, "It's time to turn the first page." ”

Then he opened the cover, and saw that on the left side of the page was embedded a metal of another color, as if it had been written in ink. Unfortunately, we can't read these words either. On the other side is the switch on the next page. It's also a trap.,There's a strange pattern of hollowing out around the perimeter.。

"The texts have long been lost, and we don't know how to read them, but they took this layer into account, so they left another way of reading." Goliath pressed it in the corner of the page, and the page projected its effect in the air, apparently what they had written. But we've already seen this record, and it's the Giants demonstrated by Goliath before.

"The first mechanism is called the mechanical aperture, and it's the one I just opened; This second trap is called the Spinning Labyrinth; The third mechanism is called the Mokai gear; The fourth mechanism is called the paradox slider. There are four in total, and the opening of the second mechanism is a record of the second generation of civilization. With that, Goliath began to move his hands again, moving a spinning disc step by step, manipulating the cylinder below to roll through the labyrinth. This time it was much slower than the first one, and it took more than half an hour to hear the sound of the ball falling into the hole, followed by a crisp thud.

Goliath just turned the second page, and it was a bunch of incomprehensible words, the same Goliath was in the book, and it was projected in the air, which was the second generation of human beings, the Dagenya civilization. We've seen this before, so Goliath quickly skipped it.

"The mechanics of this book are very complicated, and each one is more difficult than the other, and the third mechanism will take about 2 crystals if it is completely unlocked, which is equivalent to 4 hours of your measurement time. So I unlocked it in advance, and I can just open it. After saying that, he turned the third page directly, and sure enough, he was not locked by the mechanism.

It's still a text that can't be seen, but fortunately, there are projections that make it easy for us to understand.

I saw a city appear in the sky, this is a view from the air, gradually zooming in, this is a city made of completely metal, but not all the surfaces are polished smooth, this is to prevent the refraction of light. Then quickly swept by, and the buildings were presented in front of everyone's eyes one by one. It's all metal, and the vehicles on the road are also the product of mechanical civilization.

Finally there was a Talada man, I don't know if I should call him a human or not, he looked more like a robot, and it was a mechanical combination, and there were vague appearances of some people, electronic eyes flashed red, hands had become mechanical hands, feet had become tracks, and there was a backpack on the back, which should be energy. Let's put it this way, only the head and torso are flesh, and the other limbs have become mechanical.

"This is their image, and this is just one of them, and they can change their limbs as needed. They were born mutilated, with only a head and torso, and their limbs were basically deformed, so they had to be fitted with robotic arms and feet. The energy source they use is nuclear. Goliath introduced.

"Later, based on the information they left behind, we found some traces, and you may have also found traces of nuclear reactors on a certain continent now."

"Oklo Nuclear Reactor ?!!" An expert below shouted, and then he said, "That has been confirmed to be a natural nuclear reactor, and it has nothing to do with the Talada you said, right?" ”

"Yes, it's a natural nuclear reactor, but don't you think it's strange that there are so many uranium mines on this planet, why are there only traces of natural nuclear reactors there?" Goliath asked rhetorically.

The "......" expert fell silent, as if they had never considered this issue, and he also felt suspicious when Goliath said it.

"And the content of uranium ore there is not the highest in the world, and everyone knows how harsh the conditions required for nuclear reactions are, and the consequences of a slight carelessness are unimaginable. Goliath glanced at everyone.

Everyone remained silent, it seems that Goliath is right, nuclear reactors are inseparable from people, although now largely controlled by computers, but still need to be monitored by people at all times. And a natural uranium mine can react for hundreds of thousands of years or even longer, and it is still unharmed? It is too coincidental to put together a series of conditions in nature for a nuclear reaction to take place.

"It's the work of the Talada people, and they're using the nuclear energy there." Goliath said.

"It's still not right, there is no way to fake the half-life, we have tested there, it should have started 2 billion years ago, the half-life is 7.00×108 years, and the time point where the official reaction began should be 700 million years ago, and the Talada civilization you said was more than 400,000 years ago, the time is not right, the difference is too much." The expert just now refuted it again and put forward a favorable basis.

"You're right, according to the half-life, the reaction there should be from 700 million years ago, this is the law of the world, and it cannot be changed. But you forgot to do the math, what if someone used it to speed up this reaction? Goliath said, tilting her head and looking down.

"The determination of isotopes of the surrounding rocks can be demonstrated." He still did not abandon his position.

"Yes, but there is a difference in this, the reaction of the uranium ore is accelerated, and the isotopes in the surrounding environment decay according to the laws of nature. So it gives you a delusion. The timing of this reactor was incorrectly located, thinking it was synchronized. At the same time, the Taladans have done something to the uranium mine here, which has also caused you to misjudge the timing of this uranium mine. Another point is that you are too convinced of the current state of science and technology to imagine that there has ever been a civilization that could use nuclear energy, or that you once doubted it, but you denied it. Only you can find out why. Goliath grinned as if mocking.

"Our subsequent discoveries about this civilization only confirm the existence of this civilization, and we do not know the reason for their destruction. They are not prosperous, and the birth rate is too low, so the scope of life is not large. So that's all we can show you now. Goliath said with some regret.

"In the same way, I also unlocked the fourth mechanism in advance, and if I want to unlock it, it will basically take half a day. Now there's the last page, it's not early, let's have lunch first. Goliath said.