The image of Ying Huo guarding his heart hung in the sky for more than an hour, and then gradually could not be observed. Meng Yi returned to his tent with all his thoughts. Yang Yifei sighed lightly and went back to the tent to rest.

As expected, the image of Ying Huo guarding his heart should have been observed by the people from the Taishi Ling Yintianjian. Recently, the First Emperor may not be able to sleep well.

The next morning, the troops set off. After leaving Hengshan County, they walked for more than half a month and arrived in Dedong County. While they were walking, suddenly a soldier pointed to the sky in the southeast and shouted loudly: "Look, everyone, there is a big fireball in the sky."

Meng Yi and Yang Yifei turned their heads and saw a large fireball dragging its long tail flames from the sky in the southeast, falling down toward the earth in a diagonal direction.

Yang Yifei's heart moved. This is probably what is called "falling stars to the East County, and the land reaches the stone". This meteorite, if nothing unexpected happens, should be the meteorite that can create a weightless environment.

The real imperial tomb of the First Emperor in the original play was made of this meteorite structure. The meteorites were broken into small pieces and placed according to certain rules to form a weightless environment similar to space.

Of course, it is just a gravity-free environment, not a vacuum environment. If a person holds one piece of his left and right hands, he can make his body without gravity in a certain range.

When Meng Yi saw the meteorite, he thought of the previous Ying Huo Shouxin, and the shadow covered in his heart became thicker. He asked Yang Yifei in a deep voice: "Brother Yang, what's going on?"

Yang Yifei said with a relaxed expression: "General, there is no need to worry. This is just a small star outside the sky falling to the earth, and there is no metaphor."

"There are various stars in the sky, and many stars have special features. Some contain extremely hard iron. If they are cast into weapons, they can cut off gold and jade, and they are invincible. This type of iron is called meteorite or black iron."

"It is said that the magic craftsman Ou Yezi, hundreds of years ago, got a piece of meteorite and cast so many divine weapons that have been passed down through the ages."

"Some stars are harmful to the human body, and can emit an invisible force, damage the human body and cause people to suffer from various strange diseases."

After hearing Yang Yifei's explanation, Meng Yi breathed a little relieved. Nangong Yan, who was beside him, suddenly asked: "General Yang, why did the stars fall to the earth?"

The other soldiers also looked at Yang Yifei curiously. Many people behind them leaned forward, wanting to hear Yang Yifei clearly. This is a good opportunity to gain insight.

Yang Yifei thought about it and transformed gravity into language that everyone could understand, explaining: "It's very simple, because the earth under our feet also has an invisible force, which is a suction force that sucks us firmly on the ground."

"Have you never thought about it? Why do we always fall to the ground after we jump up? Why do the things we throw out eventually fall to the ground? This is the effect of the suction force of the earth."

"Everyone knows that the stars in the sky are not circulating. Sometimes, if they move to a place closer to the earth, they will be pulled down by the sucking force, causing the stars to fall to the ground."

When Yang Yifei explained, the soldiers around him all raised their ears and listened carefully. After listening, they suddenly realized and became more insightful.

They really never thought about why everything fell to the ground, not to fly to the sky, because the earth kept sucking them.

Nangong Yan was like a curious baby. After Yang Yifei explained the gravity, a new problem arose, "Then why can birds fly in the sky?"

Yang Yifei glanced at him speechlessly. The reason why he explained this to everyone was not to tell them, but to spread these principles to the First Emperor through the crowd.

Because he knew that in the year when the First Emperor died, three strange phenomena occurred, which made the First Emperor feel worried and his body collapsed faster, and eventually led to him being unable to get sick.

The first of these three strange phenomena is the Ying Huo Shuxin, and the second is the incident of the meteorite in the meteorite. The meteorite was used by the remnants of the six kingdoms, and the seven words "The First Emperor died and divided the earth" were engraved on the meteorite.

The First Emperor was already "deathful" and when he saw this again, how could he not be angry? When he was angry, his blood pressure was rising, so how could his body be better?

As for the last "Ancestral Dragon Death" incident, it has not happened yet, so it is difficult for him to make a conclusion, but most of the ten people were created by those who are interested.

So after he explained these scientific principles and introduced them to the First Emperor's ears, he could somewhat relieve the First Emperor's worries. Even if it could make his blood pressure slightly increase, that would be good. By the way, he could also do a popular science to give enlightenment to those who are engaged in scientific research.

But no matter what, since Yang Yifei said it, the first person in the world to discover gravity is Yang Yifei, and the words he said will most likely be recorded in history.

So after hearing Nangong Yan's question that seemed to be a stubborn person, Yang Yifei still explained patiently: "That's because the suction and pulling force of the earth can be fought against. For example, when you jump up, you have to use your strength, right?"

"At this time, your own strength forms a confrontation with the suction and pulling force of the earth. By the same token, the flapping of the bird's wings is also a confrontation with the suction and pulling force of the earth."

"But it is obvious that whether it is a human or a bird, the strength is not as good as the earth, so a human can only jump up a little and be sucked back by the earth. The bird cannot fly all the time. It will be tired and need rest."

"The heavier the earth is against something, the greater the suction force. The more people heavier the birds, how heavy are? So birds can fly, but people cannot. Do you understand?"

As soon as Yang Yifei finished speaking, the soldiers around him spoke one after another.

"I understand, thank you General Yang for answering the questions."

"General Yang knows a lot. This time he has gained some knowledge, haha."

"It's true that he is General Yang, and he is very knowledgeable."

Nangong Yan stroked his chin gently and was about to speak again, Yang Yifei hurriedly said, "General, I don't know what the star that fell to the ground is. Why not take people to explore it? If it is a meteorite, maybe we can also ask the craftsmen to cast some magical weapons."

Damn, this guy is not over yet. If you ask, can I still teach you a lesson in astronomy and physics here?

Meng Yi said happily when he heard this: "Okay, you can take the Five Hundred Light Riders there!"

"only."

Yang Yifei ordered all his troops and ran towards the direction of the meteorite falling. Nangong Yan sighed helplessly. He originally wanted to ask, the moon looked so big, and it must be very close to the earth, so why wouldn't the moon fall?

Fortunately, Yang Yifei saw the opportunity quickly and ran away. If Nangong Yan really asked this question, he really didn't know how to explain it.

Because to explain this problem clearly, we must explain the "Law of Gravity". To explain this problem clearly, we must tell them that the earth is round. If we ask this step by step, there will be endless things to explain.

The most important thing is that many things can be explained clearly from these ancient people? Their cognitions are different!
Chapter completed!