The image of the glowing confusion and guarding the heart hung in the sky for more than an hour, and then gradually disappeared, Meng Yi returned to his camp tent full of concern, Yang Yifei sighed lightly, and also went back to the camp tent to rest.

Not surprisingly, this image of bewilderment and guarding the heart should have been observed by the people of Taishi Ling Qin Tianjian, and the First Emperor may not be able to sleep well recently.

Early the next morning, the troops marched, and after the team left Hengshan County, they walked for more than half a month, and arrived in the territory of Dedong County. ”

Meng Yi and Yang Yifei turned their heads to look, and saw that in the southeast sky, a large fireball dragged a long tail flame down from the sky, and fell diagonally towards the earth.

Yang Yifei's heart moved, this is probably the so-called "Falling Star Xiadong County, to the ground is stone", and this meteorite, no accidentally, should be the meteorite that can create a weightless environment.

The real imperial tomb of the first emperor in the original play is made of this meteorite structure, which is broken into small pieces, and then placed according to certain rules, which can form a weightless environment similar to space.

Of course, it is only a gravity-free environment, not a vacuum environment, and if a person holds a piece in each hand, he can make a certain range of his body free of gravity.

When Meng Yi saw the meteorite, he thought of the previous glow and guard, and the shadow in his heart became thicker, and he asked Yang Yifei in a deep voice, "Brother Yang, what is the situation?" ”

Yang Yifei said with a relaxed expression: "The general doesn't need to worry, this is just a small star falling to the earth outside the sky, and there is no metaphor." ”

"There are all kinds of stars in the sky, many of which have peculiarities, some of which contain extremely hard iron, and if they are cast into blades, they can cut gold and jade, and they are indestructible, and this kind of iron is called meteorite iron or dark iron."

"Legend has it that the divine craftsman Ou Yezi hundreds of years ago obtained a piece of meteoric iron and forged so many divine soldiers that have been passed down through the ages."

"Some stars are harmful to the human body, and they can emit an invisible force that damages the human body and causes people to suffer from all kinds of strange diseases."

After listening to Yang Yifei's explanation, Meng Yi breathed a sigh of relief, and Nangong Yan on the side suddenly asked, "General Yang, why did the stars fall to the earth when they hung in the sky so well?" ”

The other soldiers also looked at Yang Yifei curiously, and many people behind them leaned forward, wanting to hear Yang Yifei's words clearly, this was a good opportunity for a long insight.

Yang Yifei thought for a while, translated gravity into a language that everyone could understand, and explained: "It's very simple, because the earth under our feet also has an invisible force, which is a pulling force that sucks us firmly on the ground. ”

"Didn't you ever think about it? Why do we always fall to the ground when we jump, and why do things that are thrown end up falling to the ground? This is where the pulling power of the earth comes into play. ”

"As we all know, the stars in the sky are constantly moving, and sometimes if they move closer to the earth, they will be pulled down by the force of suction, causing the stars to fall to the ground."

When Yang Yifei explained, the soldiers around him pricked up their ears and listened carefully, and after listening, they couldn't help but suddenly realize that they had learned a lot.

Indeed, they never thought about why everything fell to the ground and not to the sky, because the earth had been sucking them in.

Nangong Yan was like a curious baby, after listening to Yang Yifei's explanation of gravity, a new question was born, "Then why can birds fly in the sky?" ”

Yang Yifei glanced at him speechlessly, the reason why he explained these things to everyone was not to tell them, but to spread these truths to the ears of the First Emperor through the mouths of the people.

Because he knew that in the year of the First Emperor's death, three visions occurred, which made the First Emperor worry a lot, made his body collapse faster, and finally caused him to become ill.

These three visions, the first is the Luminous Confusion and Guarding the Heart, and the second is the Meteorite Xiadongjun Incident, the meteorite was used by the remnants of the Six Kingdoms, and the seven words "The First Emperor died and divided" were engraved on the meteorite.

The first emperor was already "evil words to death", and when he saw this again, how could he not be angry in his heart? In this hurry, blood pressure is rising, how can the body get better?

As for the last incident of "Zu Long's death this year", it has not happened yet, and it is difficult for him to make a conclusion, but nine times out of ten it was also caused by someone with a heart.

Therefore, after he said these scientific truths and introduced them to the ears of the First Emperor, he could somewhat dispel some of the worries of the First Emperor, even if it could make his blood pressure rise a little, it would be good, and by the way, he could also do a popular science and give a revelation to those who are engaged in scientific research.

But anyway, since Yang Yifei said it, the first person in the world to discover gravity became him Yang Yifei, and most of the words he said will go down in history.

So after listening to Nangong Yan's question, Yang Yifei still patiently explained: "That's because the suction force of the earth can be resisted, for example, when you jump up, you have to use force, right?" ”

"At this time, your own strength forms a confrontation with the pulling force of the earth, and in the same way, the flapping of the wings of a bird is also a confrontation with the pulling force of the earth."

"But obviously, whether it is a person or a bird, the strength is not as good as the earth, so people can only jump up a little bit, and they will be sucked back by the earth, and the bird cannot fly all the time, it will also be tired and need to rest."

"And the heavier the earth, the greater the pulling force, how heavy are people, how heavy are birds? So birds can fly, but people can't, you understand? ”

As soon as Yang Yifei's voice fell, the surrounding soldiers spoke one after another.

"Understood, thank you General Yang for your doubts."

"General Yang knows a lot, this time it's a long experience, haha."

"Sure enough, he is worthy of General Yang, and he is really well-informed."

Nangong Yan stroked his chin, and was about to speak again, Yang Yifei hurriedly said: "General, I don't know what the star that fell to the ground is, it's better for the last general to take someone to investigate, in case it is meteoric iron, maybe we can also ask craftsmen to cast some divine weapons." ”

Nima, this guy is not done yet, if you continue to ask, why can I still give you astronomy and physics lessons here?

Meng Yi said happily when he heard this: "It's okay, you can take five hundred light horses!" ”

"Yui."

Yang Yi flew a few people and horses and ran towards the direction where the meteorite fell, Nangong Yan sighed helplessly, originally he wanted to ask, the moon looks so big, it must be very close to the earth, why doesn't the moon fall?

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

Because to explain this problem clearly, you have to explain the "law of gravitation" clearly, and to explain this problem clearly, you have to tell them that the earth is round, and if you continue to ask this question step by step, it will be endless, and there will be more and more things that need to be explained.

The most important thing is, can many things be explained clearly with these ancient people? Cognition is different!