After half a month, he actually returned to Tucson City again, and Sun Cheng seemed more cautious than before.

"University of Arizona? Don't let me down..."

Secretly taking advantage of the darkness, he lurked near the [University of Arizona] campus. While Sun Cheng checked the distribution of monitors near the school, he calmly looked for a location that would facilitate his invasion into the school.

Before returning to Tucson, he stayed in Carson, Nevada for two days.

During two days, Sun Cheng was busy looking for clues about [Fire Source] everywhere and invaded the Internet many times.

Not only did he search for all the meteorite disaster records recorded in American history, he also tried his best to find all kinds of information related to "haunted" and "robots" online.

But what disappointed Sun Cheng was that he failed to search for any commotion caused by [fire source] on the Internet.

However, he did not find any suspicious points at all. When investigating the meteorites from the sky, Sun Cheng found a suspicious clue.

As one of the countries on Earth that have been hit by meteorites the most, the United States has preserved rich records of meteorite landings in various states. Many of the small craters are equipped with professional inspection records, but the investigation called [Ballinger Crater] is vague, which immediately aroused Sun Cheng's suspicion.

Patiently following this suspicious point, he continued to investigate, and the more he felt something strange there was.

According to Sun Cheng's investigation, the [Ballinger Crater] is also often called the [Arizona Crater]. It is located in a desert in Arizona. It is a huge meteorite with a diameter of 1.2 kilometers and a depth of 180 meters. It is suspected to be formed by a huge meteorite hitting the earth ten thousand years ago.

There are many introductions to it online. For example, some geological experts believe that the mass of meteorites hitting the desert in Arizona is estimated to be several million tons. The impact degree entering the earth's atmosphere is between 10 and 20 kilometers per second. When the impact is impacted, it releases about 10,000 tons of TnT equivalent, which is comparable to a large-equivalent hydrogen bomb.

Logically, a meteorite of this size hits the earth, which is rare in a thousand years.

Even though the [Ballinger Crater] was caused ten thousand years ago, there is no reason why the US government sent a large number of experts to study the small meteorites that fell in the territory in the past hundred years, but did not study it.

But the result of Sun Cheng's careful investigation was that he only found that more than 90 years ago, in 1912 AD, [University of Arizona] sent a scientific expedition team to investigate the [Ballinger Crater] at his own expense.

In addition, what did the scientific expedition team find? What members are there? Have meteorite fragments been found, etc.?

None of these are found online!

This is interesting!

The largest crater in the United States cannot submit a detailed investigation report, and in recent decades, there is no news that the US government has sent additional experts to investigate it!

What's more, this [Ballinger Crater] is also located in Arizona. With Sun Cheng's understanding of the treacherous Red Spider, he would never have placed his base in the suburbs of Tucson, Arizona, USA after he landed on Earth for no reason.

No more information was found online, so Sun Cheng had to risk his return to Tucson City again in order to sneak into the [University of Arizona] school to see if he could find more analysis reports on [Bagrin Crater].

This is undoubtedly a very risky move!

Yes, after experiencing the attack on Davis Montsan Air Force Base in the outskirts of Tucson City and the theft of four nuclear warheads, the US government has never relaxed its investigation into the whole matter.

He was not sure about anything else. Anyway, Sun Cheng felt extremely irritable before he got close to Tucson City, and an indescribable feeling of uneasiness kept warning him.

After he sneaked into the city, he saw armed infantry vehicles and helicopters of the National Guard that frequently appeared on the streets and alleys. It was even more common for police patrols.

Therefore, Sun Cheng was also cautious, for fear of making any mistakes.

[Spy Template] After quickly capturing all the nearby surveillance equipment information, Sun Cheng looked around and when a big tree was not far from the school courtyard wall, his eyes lit up.

After quietly touching the big tree, Sun Cheng jumped to a branch on the big tree. Then he jumped again with the help of the branches. When he landed again, he had already entered the campus of [University of Arizona].

[University of Arizona] is the first comprehensive research university in Arizona. This public university receives nearly 700 million US dollars in scientific research funding from the National Science Foundation every year. The school’s astronomy, geology, geography, civil engineering and other disciplines were very strong at the beginning. This is one of the reasons why Sun Cheng suspected that the scientific expedition team sent by the University of Arizona more than 90 years ago must have appeared something when he arrived at the [Baringer Crater].

The nightlife of American college students is obviously very rich. Although it is already night, students can still be seen coming and going in and out from time to time on campus, forcing Sun Cheng, who does not want to be exposed, thus attracting the National Guard who is alert on nearby streets, to avoid it carefully.

After exploring the campus for a while, I finally found the school library.

Unexpectedly, there was only a normal lock hanging on the front door of the library, but this thing could not stop his invasion at all. His fingers were slightly deformed and inserted into the key hole. The next moment the lock was opened. After entering, the door was closed again. Sun Cheng walked directly towards the administrator counter.

After all, it is a library of a world-renowned university. The school library of [University of Arizona] is quite large. It is said that there are a total of 2.9472 million books stored, and there have been more than 30 million e-books. It is quite difficult to find what he has checked out from such a vast sea of ​​books.

There were two computers on the administrator counter. After opening it, Sun Cheng could instantly invade the campus network. However, he did not do so. Instead, he directly connected to the library's e-book library and began to search for the information he needed.

After searching for more than half an hour, what disappointed him was that Sun Cheng only found two names called "Neville Otavian Brewster" and "Wallace Wilson Claremont" in the school history stored in the e-book library.

According to the history of the University of Arizona, both of them are professors at the school. One of them is in geology and the other is in charge of geophysics and seismology.

The school history mentioned that they started a scientific research in 1912 and then left the company the next year, and then their whereabouts were unknown.

No matter how Sun Cheng searched, he couldn't find any more information about them.

Unwilling to give up, Sun Cheng thought about it for a while, and then locked the location of the school history and the geological investigation materials of the [University of Arizona] through the computer. He turned off the computer and searched one by one in the room where the school history was stored on the fourth floor of the library for more than two hours. He only found out that "Wallace Wilson Claremont" had a son named "Benjamin Roddick Claremont".

He then went to the bookcase where geological materials were stored again and started to search carefully one by one.

Finally, hard work pays off. In an autobiographical novel called "Interesting Earth" donated to the school by alumni, Sun Cheng found something that interests him very much.

"...A classmate from Coconino County mentioned to me that there is a sacred land of Indians in Flagstaff, which is said to be a bottomless and several kilometers wide cave, and it is said that it is a place of sacred arrival. When I talked to Professor Brewster, he said that it was very interested and told me that it might be an unprecedented appearance. Yes, we call it a crater. If it is true as the Indian legend, it is very likely that it is the largest crater in American history..."

"In July 1912, Professor Brewster's application was approved and he received $12oo, which was enough for him to go to Flagstaff on holiday. He invited me, but I wanted to buy a car, so I was going to work during the summer vacation. Professor Brewster was a little disappointed but he understood..."

"I didn't see Professor Brewster after the start of school. I asked for it and found out that he was still in Flagstaff. I applied for $2ooo from the school again, and also pulled Professor Claremont into the expedition team. The stereotyped professor is gone. This may be good news..."

"Christmas is coming, and Professor Brewster wrote to me that he was very happy. The report he submitted to the North American Geological Society with Professor Claremont caused a huge sensation. Many people came from Philadelphia, New York and Washington, and they visited our presence in Flagstaff, especially the charming meteorite he repeatedly mentioned. He said a gentleman named Vince Mihos Lawson from the Philadelphia Brotherhood proposed to apply to the U.S. government to transport it away and hide it for research..."

"Professor Brewster decided to leave. He asked me if he would go to study the meteorite with him, but my father hoped that I could go home and inherit his fertilizer factory, so I refused him, which made him very sad. We had letters for the next few years, but it only lasted for five or six years. When I asked him about his job location for the last time and he told me about Heixia, I never received a reply from him..."

ps:

This chapter makes up for yesterday's fever, but the fever was not subsided. After knocking on the medicine for a chapter, I went to bed.
Chapter completed!