"Yinzi, are you okay?" Cheng Mo asked, and then asked in surprise, "What's wrong with your face?"

"They fed me some medicine, and then I was poisoned, and that's how it was after the rescue," Zhu Yuyin said, looking up. Pen "Fun" Pavilion www.biquge.info

Zhu Yuyin and Liu Ruyan were originally fellow villagers, studying in a middle school, they were both top students in the school, and their family situation was not very good, so after going to college, they came together. However, putting aside everyone's friendship and serious analysis, it is quite normal for the two to break up in the end.

In terms of family situation, Zhu Yuyin's family is also a destitute household, which is not as good as Chang Zheng's family, or may be slightly better than Cheng Mo's family.

In terms of appearance, Zhu Yuyin doesn't look very good, with a long horse face. However, in high school, everyone was more simple, their appearance and family background were secondary, and their grades were the most important, and they were admitted to the same university, so Liu Zhu and the two became lovers.

However, entering the university is actually equivalent to starting to integrate into this melting pot, if the children from the big cities are better, the children from the closed countryside will be greatly impacted.

Here, Zhu Yuyin is no longer the top student, Liu Ruyan's vanity is relatively strong, and the factors of appearance and family background have become prominent.

But this is not Cheng Mo's surprise, it turns out that Zhu Yuyin has a horse face, but it is also a plump horse face, and now it has become a monkey cheek horse face, this look can scare children to cry when they go out at night.

"Feed the medicine?"

Xu Sheng said on the side: "Mozi, the city has promised to undertake all the restorative treatments in the later stage of Yinzi. ”

Not only that, but also dealt with several relevant responsible persons, and N University also restored Zhu Yuyin's student status, and the city took out a large amount of money as compensation. But here's the problem...... The culprit was still bouncing happily outside.

Xu Sheng was afraid that Zhu Yuyin would take revenge on Chen Han, but the revenge failed and he was sent in again.

Chang Zheng said: "Hold back." ”

"Yinzi, Zhengzi, don't hold back, if it's unfair, that country has it, but that country has its own systems and rules, and it won't tolerate someone easily crossing these rules. Besides, now is the time for the country to rejuvenate, and he has already crossed this rule......"

Chen Han still wanted to intimidate Professor Ouyang.

Cheng Mo estimated that after Professor Ouyang's truthfulness, it was estimated that this matter had entered the high-level sight. Is it really a one-handed cover?

Professor Ouyang is not an obscure poor student, although he is not a physical and political official, and at this moment, if Chen Han is muddy, even the parents behind him can be dragged into the water by him, and become the real master of the cheat.

"Shengzi, Mozi, you don't need to persuade me, I know in my heart, the gentleman takes revenge, ten years is not too late, I can afford to wait. ”

"That's good, I'll go to the teacher's house. ”

Cheng Mo came to Ouyang Jiong's house, and there were four guests in his house, one was Liang Xingyong, who was studying for a doctorate at N University, and the other two were Wang Bingcheng and Li Changzhi, both of whom held important positions in relevant museums in the city, and the three of them also had another identity, all of whom were protégés of Professor Ouyang.

In the past, he occasionally worked with Cheng Mo to cooperate with Ouyang Jiong to do research, Cheng Mo knew everything, and Cheng Mo didn't know another person.

Ouyang Jiong introduced Cheng Mo, and Cheng Mo learned that his name was Hu Weidao, and he was also Professor Ouyang's protégé, and he was transferred to the north after graduation. Therefore, after Cheng Mo was enrolled, he could not participate in many postgraduate examinations.

After the introduction, Ouyang Jiong said: "Cheng Mo, you came just in time, I am also going to call you to come over, sit down." ”

Cheng Mo sat down.

Ouyang Jiong turned on the computer and said, "This is that Jiuding, you use your mobile phone to download the relevant photos." ”

Cheng Mo first glanced at it with his eyes, there were nine giant tripods on the computer, all of them were atmospheric and clumsy, but the styles were different, even the text, ornamentation, animal and plant patterns were also different, it could only be said that the height was similar, and the gap was not too big. One of the tripods is the original tripod forged by Dong Zhengming!

"Teacher, what's the density?"

"The density is 4.3. ”

"Sure enough, is it made of titanium?"

Titanium alloy is a generic term, the general density is about 4.5, but not necessarily, with the addition of different metals, the density will be different, including color, strength, etc. will also change.

"It's not a titanium alloy, it may be thousands of times stronger than β alloys. ”

The world's highest strength alloys are special magnesium alloys and aluminum alloys, but they are relatively mature in technology, high in strength, and large-scale practical or various titanium alloys.

Titanium alloy with the addition of different metals, the formation of a variety of titanium alloys, but the overall divided into three, at less than 882C is a dense hexagonal lattice structure, called a titanium, above 882C is a body-centered cubic lattice structure, called β titanium, using the above two different characteristics, adding appropriate alloying elements, so that it has biphasic, it is called (A + β) alloy. For the sake of simplicity, Huaguo is referred to as TA, TC, TB.

Because the α titanium alloy has the best machinability, followed by α+β titanium alloy, and β titanium alloy is the worst, the most commonly used among the three titanium alloys are α titanium alloy and α+β titanium alloy. However, in terms of strength, the highest is still β alloy, and even the strongest alloy is the highest among large-scale practical alloys.

Cheng Mo gasped: "Thousands of times how many tens of thousands of times the alloy of β is?"

"Well, so on the premise that it can't be destroyed, Kyoto hasn't come up with a way to take its powder and study it so far. So they combined three dating methods to measure the dirt and build-up on the outside. ”

Dating is not only a carbon-14 dating method, but also thermoluminescence dating and archaeological magnetic dating methods, the common dating methods are these three, but the most common is carbon-14 dating.

There are pros and cons to each of these three dating methods, in short, the shorter the time, the easier it is to measure, and the longer the time, the less easy it is to measure, and it is easy to produce large errors.

"The outer layer of attachment is about 2,200 years old. ”

"It coincides with the time when Jiuding disappeared. Liang Xingyong said.

According to some historical records, Xia Yu Jiuding has been passed down from generation to generation as the treasure of the town of the Xia, Shang and Zhou dynasties, but it cannot be fully believed, even if it is the Xia Dynasty, there is still a lack of strong evidence to prove its existence.

However, it can still be seen in various books of the Spring and Autumn Period and the Warring States Period, and the records at this time already have reference value. It's just that Qin Shi Huang burned books and pit Confucianism, which led to the disappearance of many books, so what this Jiuding looks like, and where it was kept after it was obtained by Qin, descendants have not been clear.

The last appearance was in 219 B.C., Qin Shi Huang made his first tour of the east, and after sacrificing Mount Tai, he made a special trip to the shore of Surabaya in Pengcheng to organize manpower to salvage the missing Ding.

Subsequently, there was no trace of Jiuding in the annals of history.

But another problem arises, Chinese history has an accurate historical chronology, which began in the first year of the Western Zhou Republic, that is, the year of the Chinese rebellion in 841 BC.

Subsequently, historians appeared one after another in various candidate states, such as Dong Hu, a historian of the Jin Kingdom, who wrote "Zhao Dun killed his king"; Cui Zhu's killing of Qi Zhuang Gong was also recorded by the historian of Qi, but he was killed by Cui Zhu, and when he arrived at the younger brother of the historian, he wrote Cui Zhu to kill his monarch and was killed, and when he reached the third brother of the historian, he still wrote Cui Zhu to kill his king, Cui Zhu was dumbfounded, and he was stunned. At this time, the history books are the most credible.

However, many historical books were later burned by Qin Shi Huang.

But as long as there are history books, at least before the book burning, various historians will not make fakes, that is, as early as the first year of the Western Zhou Republic, Jiuding began to appear.

With the technology at that time, a few bronze tripods were placed outside for such a long time, allowed to oxidize, and without advanced maintenance technology, they would have already become a pile of green copper slag, how could they be regarded as a national weapon, so that Qin Shi Huang sent someone to salvage it?

Then there are only two possibilities, all the history books recorded in Jiuding are wrong!

In fact, with the Spring and Autumn Historian writing the history book directly, this possibility is extremely unlikely.

There is also a possibility that the technology of these nine tripods is quite advanced and can resist oxidation. But it was atheistic before, and no scholar dared to speculate like this.

"This is the first layer of attachments, which confirms that Jiuding disappeared during the Qin Dynasty, and how it disappeared is still an unknown mystery. But...... The innermost attachment, after repeated dating, has concluded that its history may be more than 4 billion years long!"

"Teacher, is it the Ancient Universe?" Cheng Mo asked.

"They really have a history of more than four billion years, they are the products of the Underworld, Cheng Mo, your guess is right, they are magical enough. ”

The chronology of the earth is also divided into universes, the stratigraphic system is the universe, and the geological age is the universe, the difference is this, the time history is the same.

Generally, the earth's geological age is divided into Archean, Proterozoic and Phanerozoic.

The Archean began 3.8 billion years ago and ended with a great oxidation event 2.5 billion years ago, when the reducing Archean primitive atmosphere dominated by methane was transformed into an oxygen-rich oxidizing Proterozoic atmosphere, which led to the first ice age of the earth that lasted 300 million years, the Huron Ice Age.

The Proterozoic is divided into 3 generations. 25-1.8 billion years for the Paleoproterozoic, 18-1 billion years for the Mesoproterozoic, and 10-6 or (570 million) years for the Neoproterozoic, during which time multicellular animals have emerged.

Finally, the Phanerozoic, which began 570 million years ago and continues to the present, is divided into three "generations" of the Paleozoic, Mesozoic and Cenozoic. The Paleozoic era included the Cambrian, Ordovician, Silurian period, Devonian, Carboniferous, and Permian periods, and organisms began to evolve. But 440 million years ago, at the end of the Ordovician period, the Earth ushered in its first mass extinction, resulting in the disappearance of about 85% of all species. 365 million years ago, in the late Devonian period, the earth ushered in the second mass extinction, and most marine life was wiped out. 250 million years ago, at the end of the Permian period, the Earth ushered in the third mass extinction, the last mass extinction, resulting in the disappearance of more than 95% of the Earth's life.

The strangest thing is that the cause of these three mass extinctions has not yet been accurately claimed.

The Mesozoic Era included the Triassic, Jurassic and Cretaceous periods, and the dinosaurs came until the end of the Cretaceous extinction, which was also the most widely known extinction, in fact, only half of the species were extinct, far from being compared with the three near-obliterating horror extinctions of the Paleozoic.

The Cenozoic era includes three epochs: Paleogene, Neogene and Quaternary, and seven epochs of Paleocene, Eocene, Oligocene, Miocene, Pliocene, Pleistocene and Holocene. At the same time, it erupted for the seventh time from 2 million to 3 million years ago to 1 to 20,000 years ago, and it is also the closest great glacial period to modern times, commonly known as the Quaternary glacial age.

Don't think that human beings have fully understood the history of the earth, in fact, there are many doubts in each "universe", "era", "era" and "world" that have not been resolved.

Before these three "universes", there is another universe, the ancient universe. Scientists speculate that the Earth was formed 4.6 billion years ago, but at that time, the Earth's environment was very harsh, with violent geological activity, volcanic eruptions, and lava flowing everywhere, just like Mercury and Venus today, and constantly being hit by a large number of asteroids, comets, including the moon. Until the end of about 3.8 billion years ago, there were no more large-scale impact events in the inner solar system, and the Earth began to cool down into the Archean Epoch.

During the period of the Plutozoic Era, the earth was so bad, how could there be living beings, and such an advanced tripod was made. If the dating is accurate, there is no doubt about its preciousness, but in the environment of the Immortal Universe, how did this tripod survive? Could it really be a mythical product? Professor Ouyang's four students fell into contemplation again.

Cheng Mo was also pondering, the ancient world...... Thinking about it makes people sweat, he thought of that sentence, the nine planets were originally one planet, could it be that there was a more strange event in the Underworld? But in this way, tens of thousands of years are not too long......

The ...... of the Age of the Underworld Even after many shocks, Cheng Mo is dizzy when he thinks about it now.