The space on the altar is very large, with several floors above and below, the lowest one we are on has been flooded, and the upper layer is all made of blocks of bluestone, which are seamed together with almost no gaps, and we go up the stone steps until we soon reach the second level of the altar.

On the second altar, there is a huge bluestone case, the table is inlaid with a round stone basin, when I walk through the stone basin, I see that there seems to be something black inside, the visual distance is too short, I can only hold the cold light rod to squat down and look, at a glance, I found that the stone basin, there is a lot of black flocculent that has been solidified, has not been completely solidified.

I took * and stirred it in a stone trough, hooked up a little sticky black flocculent with the tip of a knife, walked up to the old clock, and asked him if he could tell what it was. The old bell frowned, put the tip of his nose to the edge of the blade and sniffed, then raised his head and told me in a low voice that these things should be tung oil.

In ancient times, there was no advanced smelting technology, but the basic skills of using fire have been mastered, and through the accumulation of wisdom and experience from generation to generation, human ancestors began to discover a truth, leaves and vegetation are not the best combustibles, but the black oil in the underground mines, which seems to be more convenient and burning.

This kind of tung oil should be the combustible material refined by the early human ancestors, and the quality is naturally not as good as the improved kerosene and gasoline in the later period, but the advantage is that it is coagulable, not volatile, and can maintain vigorous combustion all year round.

Because of the passage of time, these tung oils have precipitated a lot of black impurities in them, which look no different from the old black oil that has fried a lot of fritters, and the black solidification is a lump, and you can't pry it open with a knife.

At both ends of the stone trough, there are two extremely tall and huge stone statues, the stone statues are covered with animal skins, holding stone tools in one hand and torches in the other, majestic and majestic, and their facial features are polished very roughly, as if they are guarding the huge stone basin.

"What are these statues for?" Ge Zhuang was very curious, and when he found these two stone sculptures, he immediately walked towards them. Halfway through, the square bricks under his feet suddenly sank, and Ge Zhuang grinned and almost tripped over.

Then above our heads, there was a golden light refracted from mid-air, in the stone trough filled with tung oil focused into a point of light only the size of a thumb belly, along the direction of the beam, traced back to a copper pillar more than ten meters high above our heads, there is a pair of oblique copper mirrors hanging on it, the mirror surface is bulging, can reflect the light source.

I squinted my eyes and felt that the light source was falling from above, and the shape of the bronze mirror was also rather strange, with a bulge in the middle of the mirror, and the upper and lower parts were carved into a very anthropomorphic image, as if I was pregnant.

Then the beam of light that fell from the top of our heads, we all saw the bronze mirror clearly, Chen Yun was shocked, and muttered, "The wisdom of the ancients really can't be underestimated, you see, isn't this the principle of convex lens concentrating?" ”

This kind of optical law is the same as the principle of the appearance of the human eyeball, it seems to have been made by Western physicists, I can't remember what year this optical law was proposed, but at least it will not be in ancient times, could it be that as early as more than 2,000 years ago, the ancient Yelang civilization had discovered this principle?

I was in a bit of a trance in my heart, my eyes focused, I looked at the bronze mirror carefully, and I was even more sure that it was a convex lens with a strange shape, and it was estimated that the reflected light should be the sunlight projected from above, interspersed with the gaps in the arc-shaped structure above our heads, and through countless refractions, it finally shone on the bronze mirror, and after the last refraction, it fell in the middle of the stone trough.

And at this moment, the stone trough in front of us had been ignited by the points of light gathered inside, and the flames lit up in vain, startling all of us.

It's amazing that the ancients 2,000 years ago actually mastered the advanced skills of using bronze mirrors to gather light and automatically ignite!

And when the tung oil in the stone trough was ignited, I also saw the structure at the top of the altar, which was a round bluestone with a diameter of about two meters and two meters, and on the top of the bluestone stood a person holding a torch, also with a third eye, standing on one foot, with his heel slightly raised back, and the other leg straddling the air, maintaining a running posture.

"Praise the father chasing the sun?" Ge Zhuang subconsciously shouted.

I glanced at him disdainfully, and said nonsense, when Kuafu was going to be a peachwood staff in his hand, not a torch, because it should be the flint who made the fire!

The story of the Suiren making fire has a long history, and legend has it that it was the Suiren who taught humans how to use open fire, and it is understandable that the ancient Yelang people would enshrine it here.

The fire on the altar was gradually growing, and I realized that the tung oil in the two stone troughs had been melted by the high temperature, and it had actually flowed into the ditch along the small hole behind the stone trough, and the tongue of fire slowly spread out with the slow flow of the tung oil, and not far in front of us, two forks were separated, which were laid at both ends of the stone road.

As the fire in the basin was poured into the lamp canal, the fire oil in the lamp canal quickly burned, and the entire altar was illuminated by the firelight, and the scene was extremely spectacular.

Ge Zhuang grew his mouth and said that the ancients really liked to stinky and show off, didn't they just build an altar, as for such a big battle?

I said that you still underestimate the power of faith, from ancient times to the present, the gods who can be placed on the altar by people are all saints who have made great contributions to human civilization, and the deeds of saints have been publicized by mouth, and will gradually evolve into gods, you and I both understand certain optical principles, so this scene of ignition is regarded as a natural physical phenomenon, but the ancients will not, they will think that this is a miracle, since it is a miracle, of course, the more magnificent the better, so as to have a demagogic effect.

And when I was popularizing historical knowledge to Ge Zhuang, there was a roar similar to that of a flood in the distant petrified forest, and then there was a loud sound like a drum in our eardrums, like a war drum in the battle camp of thousands of troops, and the ground began to tremble.

"Oops, the fire on the altar is too bright, it must have attracted the attention of that monster just now!" Chen Yun's face changed suddenly, and her tone trembled and turned back to us and said.

"What should I do?" After everyone heard this, they all subconsciously tightened their chests, with this monster around, we have no way to concentrate on studying this ruins, this monster may run out at any time to make trouble.

"Let's go, let's get to a safe place first!" The old bell changed his face and jumped under the altar first, and everyone rushed into the petrified rainforest in a panic, each finding a relatively remote place to hide, and then staring at the brightly lit altar without blinking.

Soon after, a behemoth appeared in front of my eyes.