Until Li Sheng put away the map, Li Er still felt his head was dizzy.
Horrible, terrible...
"It turns out...it turns out the world is so big..."
After taking deep breaths several times, Li Er finally came back to his senses.
Oh my god.
Stimulate!
Wei Zheng also stared at the void with his eyes straightened and his breathing became rapid.
After a while, he turned his head and looked at Li Sheng.
"Sir, it turns out that this world is not square, but..."
"But the ground is round? Then...is the sky square?"
The map is a huge oval with vertical and horizontal lines on it.
There is no doubt that it is easy to think of the shape of the sky, as divided by these lines... square!
The earth and ocean, the whole world, are naturally round as shown in the picture.
However, Wei Zheng had never thought that the earth was not an ordinary circle, but an oval.
Hearing this, Li Sheng smiled slightly.
"Old Wei, you didn't look carefully just now. The sky is of course not square, and the earth is not round, but you have good observation skills. This earth... well, it is neither round nor elliptical."
"oh?!"
Wei Zheng was stunned.
Behind him, Du Ruhui, Fang Xuanling, and Li Er, following Wei Zheng's mention, also noticed the special feature of the map, that is, its shape.
Could this be the size of the universe?
But what Li Sheng meant when he said it was neither a circle nor an oval, it couldn't be a square.
Then Li Sheng explained.
"The true shape of the earth we stand on is a sphere."
…
"I'll go, spherical???"
Li Er was dumbfounded at once, "Sir, the earth is spherical. If we stand on it, won't we fall off?"
"Falling? Lao Li, think about it carefully, where do things fall? Do they fall to the sky? No."
"this……"
"Nothing falls to the sky, only to the ground. If it falls to the ground, it means falling on the sphere itself! And the sphere is floating in the vacuum. There is no larger sphere in the vacuum, so of course there is no such thing.
It can be dropped anywhere, but it will only fall onto the sphere itself. That is..."
"That is, the earth we stand on is also called the earth."
"This principle is called universal gravitation. It is one of the four basic forces...but you don't need to understand this."
Li Sheng put away the map and clapped his hands, "Anyway, with the brains of you mountain cannons, it's hard for me to explain it clearly. But in short, you know what's most important in front of you, that's enough."
As soon as Li Sheng said this, Li Er and others immediately felt a little fever on their faces.
What the hell is mountain gun brain...
Don't look down on people!
Thinking that one day Li Sheng will know that everyone is the wise king and wise ministers he admires so much, he doesn't know what his expression will be...
Li Er scratched the back of his head and said with a smile, "Well... Master, I just want to ask Old Li one thing. In America... do we have the chance to go up there and see it in our lifetime?"
Although Li Sheng said that the large ships needed to go to America are "not complicated and difficult."
But Li Er and others looked at each other for a moment and exchanged a look, and it was clear that this was "not complicated and difficult" for Li Sheng.
For most people, building such a ship is not only complex and difficult, but also a fantasy.
But Li Sheng smiled and then said...
"It's really not difficult to build this kind of ship. And you guys, the layout is really small. Let me put it this way. Not only will you be able to go to America in your lifetime."
"And if Li Er pays attention to this matter, I can make the steam series... Then by then, it will not only be America, it will be a land that Datang can conquer..."
"How big it is, no need to say more."
Li Er almost fainted.
Get it, you naughty kid.
You have said so, how could you still tell me not to take it seriously?
Then Li Sheng suddenly smiled, as if he remembered something.
"At that time, the territory of the Tang Dynasty will cover the whole world, and you will find that... within the territory of the Tang Dynasty, the sun will never set."
A sound of inhalation suddenly sounded... the air pressure in the yard suddenly dropped a few points.
At this moment, Li Er, Wei Zheng, Du Ruhui, Fang Xuanling and others...
Completely shocked and shocked.
If what Li Sheng said is true, it would be an eternal change!
…
Li Er and the others really didn't expect that an ordinary barbecue meal could be so thrilling.
It took a while before I finally came back to my senses.
But this time when I came to my senses, the more I thought about it, the more exaggerated it became.
At this moment, Du Ruhui suddenly remembered something and said with a sarcastic smile, "Sir, you said before that you prepared something for the Imperial Guards of the Tang Dynasty. What was it?"
"Oh, arson bombs, there's another one... Let's talk about arson bombs first."
Li Sheng looked at a few people and said, "Have you ever seen a real battlefield? It's okay if you haven't. You know the tung oil used to defend the city, right?"
Tung oil is the main fuel oil in this era.
For example, oil lamps and the like often use tung oil.
Of course, when weaving clothes and making furniture, you need to paint and so on. Tung oil will also be used in these tasks.
Li Sheng learned about the existence of this thing because he heard it mentioned by several indigenous girls in this time and space during the recent fractionation experiment.
However, Li Sheng did not know much about the family backgrounds of these indigenous girls, but he also knew that for women in this era to have such a good education level, their families must be either rich or noble.
Later, I gradually learned that they are indeed either rich or noble, and...
Because the Tang Dynasty was just established, it was obvious that they all came from military aristocrats.
Therefore, for them, the most understanding of tung oil comes from a special use...
That is to defend the city!
During the battle to defend the city, tung oil was heated and poured down from the top of the city. Not to mention its power, it was very effective in scaring people. The scene was cruel and shocking.
Of course, compared to Li Sheng’s latest work...
Of course Li Er and others knew about this thing. Not only did they know it, it could be said that they were extremely familiar with it.
After hearing what Li Sheng said, they all nodded.
"We know about tung oil. Isn't it used by the Imperial Army for fighting?"
"Yes, it is extremely useful when defending a city!"
"However, if it is a field battle on weekdays, the effect needs to be discounted. After all, the power of tung oil is compared to grenades..."
Everyone said something to each other, but they all still knew about tung oil.
But as they say...
Li Er frowned.
"The power of this tung oil is definitely not as powerful as grenades and landmines. How can the young master focus on this thing?"
"I'm just giving an example."
Li Sheng smiled and said, "What I want to say is another kind of oil."