: panda

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Whether Chen Rui can guess.
This is what a foreign guest from billions of years ago did. These aliens came to Earth on an "atomic-powered spacecraft". They built an atomic reactor in the valley of this uranium-rich mining area and released it by atomic fission or fusion. Of energy powers energy and provides energy for their activities on Earth.
Later they left the earth and returned to their hometown on an atomic-powered spaceship-an extremely distant planet. They left this extremely ancient and mysterious atomic reactor on the earth.
Alas, these reactors were probably built by previous generations of Earth civilization.
Many scholars have pointed out that prehistoric civilization was destroyed by a large-scale nuclear war.
Whether it is a masterpiece of aliens or the construction of a previous generation of civilization on Earth, both are possible.
Chen Rui plans to go deep into the cave to continue his exploration.
There are few clues.
For millions or even hundreds of millions of years, it is enough to erase all traces of prehistoric civilization or alien activity on the earth.
For example, murals of prehistoric civilizations, some metals, bones of prehistoric humans, footprints, and books will be chemically decayed, decomposed, or degraded due to long-term exposure to air over millions of years or even hundreds of millions of years. Structural changes were destroyed.
Alas, there are still some things that will be preserved.
For example, gold, silver and other metal products, the chemical properties of gold and silver are extremely inactive, it is difficult to react with other substances, and theoretically can be stored for an infinite time.
There are also three discs held by Chen Rui.
The discs are about the size of a palm, very thin and light. Each disc has a small hole in the middle, and a small groove engraved around the hole from the edge of the disc to the center of the disc.
The disc was silver-white, held in his hand, and Chen Rui touched it with his fingers. It was very smooth. It was not made of metal or carved from stone, but was made of a special material that Chen Rui did not know.
The disc is exposed to the air for a long time. After a long period of time, it has not changed at all. The dirt on the disc is still very new.
锐 Chen Rui picked up the disc and observed carefully.
I found something different on the disc.
表面 The surface of the disc is very smooth and silvery white, but it seems that a thin layer of black substance is smeared in the small grooves carved on the disc's edge to the center of the disc.
锐 Chen Rui carefully looked at the disc, and the more it looked, the more it looked like.
It seems a bit like Chen's gramophone discs in the early 20th century.
Many people can often see such scenes in some video materials of old Shanghai in the early 20th century.
举办 ​​A ball is held in the room.
On a table in the corner of the room, there is a large disc that keeps spinning. The groove on the disc is engraved with curved grooves. The disc is pressed by a pointed needle, and there is a large speaker next to it. singing.
This is a gramophone invented by Edison.
No, this is a disc recorded by aliens or prehistoric civilizations that records sounds, images, numbers, or other signals.
的 Silver-white disc made of special material is the support.
The black substance in the groove is a magnetic material or a substance capable of storing information.
锐 Chen Rui speculates whether the information of aliens or prehistoric civilizations stored on magnetic materials or materials capable of storing information can be read through a needle through electricity or other energy substances.
Chen Rui's speculation is very likely.
锐 Chen Rui put three discs into the pregnant Haizhu space.
Next, Chen Rui never found anything in the cave.
锐 Chen Rui collected some uranium ore, and buried this batch of uranium ore deep in the bottom of the pregnant sea pearl space.
This batch of uranium ore can extract 18-20 kilograms of weapon-grade uranium.
武器 These weapons-grade uranium can probably make 5-7 nuclear bombs.
The uranium ore of plutonium in nature generally contains 0.72% uranium.
Whether humans use nuclear energy peacefully or build nuclear weapons, enriching uranium is necessary.
Plutonium is used in nuclear power stations with 3% uranium 235.
Thorium uranium 235 content exceeds 85% is called weapon-grade enriched uranium, which is directly used to make raw and bullets.
Therefore, the acquisition of this batch of uranium ore by Chen Rui does not mean that he can possess nuclear weapons at once.
Obtaining enriched uranium from plutonium is a very complicated series of processes. It goes through processes such as prospecting, mining, beneficiation, leaching, smelting, and refining. Enrichment and separation is the final process and requires a high level of technology.
Plutonium 1 kg of weapons-grade uranium 235 requires 200 tons of uranium ore. Due to the issue of nuclear weapons, uranium enrichment technology is a sensitive technology forbidden by the international community.
At present, for Chen Rui, obtaining this batch of uranium ore is not significant, but it may be available in the future.
Chen Rui left the valley, made a phone call to the family, and reported peace.
Chen Rui found an open space near the stream.
The cormorant ingested two marine fishes from the ocean in the space of pregnant Haizhu.
Stuck in the stream, use a dagger to descale the two fish, remove the internal organs, and clean them.
Then he collected some dead branches and leaves and set off a fire.
Sharpened the branches and skewered the fish on the fire.
After the fish is grilled until it is almost cooked, sprinkle with salt and seasoning.
After the anchovies were grilled, they took out a bottle of red wine from the space. The red wine, the fragrant grilled fish, and dinner began in the sunset.
After eating and drinking.
Riding a little light, Chen Rui took out the sheepskin map and spread it out on the slate.
Tomorrow's route is mapped against the terrain, landforms, and landmarks marked on the sheepskin map.
"It will take 2 days for a mountain lake to reach the destination marked on the sheepskin map, if all goes well."
Collapsed the map and Chen Rui entered the pregnant Zhuhai space.
It is night in the pregnant sea space.
A round of the moon hung above the sky, and the white moonlight sprinkled on the ground, making Chen Rui feel a very dreamy haze.
There is a bed in the space, and there are various daily necessities.
I took a bath, brushed my teeth and washed my face.
I lay in bed and soon went to sleep.
The next day, Chen Rui got up very early. After washing for a while, he left the space and began to continue deep into Daqingshan.
锐 This morning, Chen Rui passed through a bamboo forest.
The bamboo forest covers a large area of ​​thousands of acres. The peaks, mountains, and ridges are rolling and rolling, and the atmosphere is natural.
The common bamboo bamboo grows in the bamboo forest ~ EbookFREE.me ~ The bamboo fragrance is clear and far away, looking from a distance, it is like a beautiful painting of bamboo forest.
Enjoy the beauty of the bamboo forest and let Chen Rui feel refreshed.
Breathing the fresh air impregnated with bamboo smell, feeling that it is continuously input into one's lungs, washing the lungs that have gradually become cloudy due to the city, and deeply feeling the precious gift of nature.
I really want to build a bamboo house to live here for a long time.
No wonder the ancients were able to write verses that would rather be meatless than live without bamboo.
Chen Rui heard the movement from the bamboo forest not far away.
锐 Chen Rui walked over and saw a fat bear-like animal lying in front of a hole, jetting into the hole with his mouth, and his front paw slamming the hole.
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