Mars is one of the eight major planets in the solar system, the fourth planet in the solar system from inside to outside, and belongs to the Earth-like planet.

The diameter is half of the earth, the rotation period is similar to that of the earth, and the revolution is about twice that of the earth. The mass is about 1/9 of the earth, and the surface gravity is about 2/5 of the earth.

In ancient Chinese books, Mars is called "Yinghuo". This is because Mars is red and fluorescent like fire. It moves in the sky, and the things are uncertain and the situation is complicated, which makes people confused, and it means "fleshing fire, free and confused".

Mars is basically deserts, surface dunes, gravel is everywhere and there is no stable liquid water body.

The main components of the atmosphere are mainly carbon dioxide, both thin and cold, with sand and dust suspended in it, and dust storms often occur every year.

Mars is inactive, and most of the surface landforms were formed during the most active periods in ancient times. There are dense craters, volcanoes and canyons, including the highest mountain in the solar system, Mount Olympus (above 27 kilometers), and the largest canyon, the Mariner Canyon.

Another unique topographic feature is that there are obvious differences in the northern and southern hemispheres of Mars: the south is an ancient highland full of craters, and the north is a younger plain.

............

In the southeast of Mars, an ancient volcanic belt, a narrow and long giant crater runs through the Elysian Volcano and Olympus Volcano. In space, it looks like a "scar" on the surface of Mars.

The edge of the crater protrudes into a towering mountain range, while the base of the crater forms an extremely deep canyon.

The central dent near the deep valley at the bottom of the crater appeared a dark shadow, which occasionally rolled up dust storms, sand and stones flew away, covering the sky and the sun.

In the dark shadows, a giant black treasure green rock with an incalculable diameter of about one kilometer and an immeasurable weight is standing there majestic, unchanged...

............

Tsinghua University, the laboratory building of the School of Astronomy, and the laboratory storing the [Flying Stone in the Sky] is gathered in the laboratory.

Among them are two academicians invited by President Li from the Chinese Academy of Sciences, one is Professor Guan Houbing, an expert in astronomy, and the other is President Li's old partner, formerly acquaintance of Naichen, Professor Zhang Tianqi, an expert in physics.

"Student Yuan Shichen, I have heard of your performance. You did not disappoint us!" Professor Zhang Tianqi looked at Yuan Shichen with a smile on his face and said.

"Thank you Professor Zhang for your compliment." Harashi Chen said modestly, "You still need more guidance for the next research work."

"Don't be so polite. Dean Li, I, and Professor Guan are old partners for many years, and we are also honored to be able to participate in such a valuable scientific research project." Zhang Tianqi waved his hand and said.

The process of scientific research is far less interesting than everyone imagined. It is often boring repetitions, as well as boring discussions and disputes.

"Combining all the archaeological excavations, it can be judged that this is indeed an ancient meteorite with witnesses."

"Can the only source of the meteorite body be confirmed now?"

"Yes, the main part comes from Mars, and the source of the black and green part is not yet clear."

"Have you sure you have referenced all the meteorite samples?"

"Is it possible that the black treasure green part was embedded in it after it fell into the earth?"

"There is no artificial trace between the black Baolu meteorite and the main body connection part."

"If you want to melt the rocks, Guloulan does not have this technical ability."

"This is the first discovery in astronomy history."

“What is the main component?”

"The main part was identified as a pure rugby-aphaeled Martian meteorite."

"Space meteorites violently hit the Martian volcanic belt, and the lava that fuses meteorite fragments escapes into space..."

“There is indeed a possibility.”

"If this is the case, the space meteorites that hit Mars must have a large volume and energy, and will definitely leave a large crater."

"Can the location of the impact be judged by the composition of the meteorite?"

"This is more difficult. Maybe we can refer to the Martian rock samples collected by Mars rovers from various countries."

"The main thing is the Black Pau Green Meteorite, and we still know nothing about it now."

"At present, let's collect some meteorite samples first and take them back to the Chinese Academy of Sciences for more in-depth testing and analysis."

"Okay, look forward to your good news."

............

A week later, some amazing research results came from the Chinese Academy of Sciences.

"After joint research by scientists from the Chinese Academy of Sciences, astronomy, physics, chemistry and biology, scientists believe that the magnetite composition in the "Black Baolu meteorite" is not produced by a natural chemical reaction, but comes from another special manufacturing process." President Li Huiqun excitedly introduced the research progress to Yuan Shichen in the laboratory.

"Scientists used the latest high-resolution electron microscope analysis to show that the magnetite crystal structure of the "Black Baolu meteorite" is likely to be formed by some super bacteria." Harashi Chen looked at the research report and was shocked by the result.

"In addition, the main part of the [Flying Stone from the Sky] was found through isotope detection and its formation dates far earlier than other Martian meteorites found on Earth (200-400 million years ago). Its history can be traced back to 2.1 billion years ago, that is, the early era in the history of Mars' geology." Li Huiqun added.

"This may mean that, 2.1 billion years ago, a meteorite from faraway space and carrying primitive life hit the volcanic belt of Mars, and violently hit a stripped piece of Mars fragment. After a long journey in space of 2.1 billion years, it finally fell onto the suburbs of the ancient city of Loulan about 2,000 years ago."

Regarding Yuan Shichen's assumption, Dean Li nodded in approval.

【Supplementary Information】:

On Earth, the oldest biological fossils we have discovered so far are rocks from western Australia, about 3.5 billion years ago. These fossils are similar to the current cyanobacteria. They are some primitive lives and are invisible to the naked eye. Therefore, it can be said that the origin of life on Earth is no later than 3.5 billion years.

At the same time, the age of the formation of the earth was about 4.6 billion years ago. With these two data, we can see that the age of the origin of life can be roughly defined between 4.6 billion years and 3.5 billion years. Today, with the development of science, geologists believe that in the early days of the formation of the earth, the earth was hit by a large number of asteroids and meteorites, and it was not suitable for the survival of life. Rather than saying that there was life on the earth at that time, it was better to say that it was destroying life. Therefore, the time when life on the earth originated was no earlier than 4 billion years.

In addition, carbon was found in 3.85 billion years of rocks in Greenland. We know that there are two types of carbon, one is inorganic carbon and the other is organic carbon. In addition, carbon is divided into heavy carbon and light carbon, so the source of these carbons can be inferred based on the ratio of light carbon and heavy carbon in carbon. Scientists speculate that these carbons are organic carbon and are derived from organisms based on isotope analysis of carbon. In other words, the time of origin of life has been greatly shortened, which is between 4 billion and 3.8 billion years ago.
Chapter completed!