A slideshow played in the past, and Yu Yifeng also shook in his heart.

Such a underground magma canal, in the primitive era can not imagine!How much work does it take?How many lives do you need to fill?

You know, this is in the ground, but it is more difficult than digging a "Beijing-Hangzhou Grand Canal"!

And this kind of thing magma will slowly condense and cool into stone, so after the completion of this canal, it needs to be cleaned and maintained frequently to operate normally, which has increased the amount of work.

This large river of magma is a revelry of the ruling class and a cry for slaves... but at the same time, it does feed a larger population and is a great initiative.The Knicks rarely need food, their digestive function is not good, only through the food intake of the necessary nutrients, the main energy is still geothermal energy.

Only slaves will consume a lot of food to get energy, but this life is often not long.

Other tribes saw the benefits and began to follow suit.But the canals required a huge amount of labor, and they waged wars to seize more of the slave resources.

Endless scenery belongs to the sage class and the ruling class...

But from a historical point of view, the slaves were the class that sacrificed the most, and they created epic greatness with the most rudimentary tools.Their blood and tears, not even a hundred magma rivers can be filled!

The ruins of a large magma river are located below the city of Thor.

Unfortunately, over time, it has been filled with solidified magma and stones... people can no longer see it as it is.

The whole slave era lasted for a long time, and the maintenance of the canal, which would kill the work of the people, could only be done by the slaves.

Dynasty change, slave revolt, another storm of blood swept in... but slavery has not changed.

The magma river must exist, so... the slave must exist.

“The development of society here is not the same as our human beings.Their feudal system and slavery have always coexisted, and the opposition has been strong, and slaves have always existed.”

But the pace of science does not stop because of bloodshed, killing, exploitation and exploitation.

The wise class of the Knicks civilization, the class of scientists, has always been transcended from the world.

From ancient times to the present, the pursuit of wisdom by the Knicks civilization has not stopped.Dynasty change has little to do with the sage class.

Several powerful tribes were united to form states, and wars were often fought between nations, but all rulers treated engineers and scientists with deference.

Without engineers, the country would soon be weak, and without scientists, technology would soon be overtaken by other countries.

Scientists in the Knicks also continue to work around magma, wanting to make magma play more role than heat.

That’s it, year after year.

War is the best scientific catalyst, and survival pressure is also a fuel for scientific growth.

The living environment here is too poor, volcanic eruptions, or earthquakes, are easy to take a lot of life, a magma river is far from enough, the Knicks urgently need a stronger industry to fight against nature!

A hundred years passed, mathematics, engineering, and mechanics came out... indeed, it did bring more powerful forces, making the Knicks civilization more admire the wisdom.

Finally, the twenty-second sage in history, "Kang", established a modern chemical system!

Modern chemistry is born!

The birth of chemistry was an unprecedented breakthrough, which meant that they had a better understanding of the various substances in the world.

For the first time, they knew about oxygen and began to try to create real combustion.

"The first organic burning phenomenon of the Knicks star was born in the hands of the sages!"That is, wood fibre is burned in pure oxygen.”

Hearing this, Yu Yifeng is a bit of a hush.

Only when the Knicks invented modern chemistry and realized the nature of combustion can they produce a small amount of oxygen, and then use the burning phenomenon that humans are accustomed to.

How happy people are...

How good Mother Earth is to mankind!

But then again, even with chemistry, their social years are still the age of slavery.Many jobs remain extremely dangerous and require slave participation.

Chemistry doesn’t change their situation much.

Because the oxygen content in the atmosphere is very low, making oxygen by chemical means is not an easy thing to do.Even if the industry, oxygen is extracted from the atmosphere, because the relationship between low oxygen content is extremely complex and the cost is particularly high.

In particular, oxygen is toxic to them!

Chemistry, so far, is of no great use... at best it has improved the lives of the rich class and has not fundamentally changed society as a whole.

But the emergence of chemistry is indeed useful, and it has also promoted the development of subsequent science.

Until ...

Three hundred years later, the twenty-fifth sage "Dirran" discovered electromagnetic induction.

A full-scale breakthrough has begun.

A historian of the Knicks civilization, in his historical writings, wrote excitedly: "It was an ordinary day, and an unusual day, a loud noise came from the river of magma, and then everyone in the city heard a frantic shout..."

“The geothermal generator appears in this world!”

This scientific giant even invented the geothermal energy generator according to the electromagnetic induction phenomenon!The whole society has made a real change!

“...electricity is a great, sudden appearance in the underground world, it grew from a baby to a giant, only three years, but directly strangled the dark throat!”For the first time, the world looks so bright.”

“This invention of the Duke of Dirran has justly won the title of the sages, and even the rulers of the enemy countries cannot be refuted...”

“Even... of the 25 great sages who have appeared, it is also the first to be well-deserved!”

“Electricity is also called the light of wisdom!”

The electric age has come so suddenly!

"Like a whirlwind, whistling the whole underground world!"The darkness fades, and the Knicks civilization is reborn and opens a new era!”

“A great time!”

Hearing this, all the human beings present were excited.

At this moment, they seem to have become Knicks, witnessing the whole process of a civilization from weak to rising.

Although the sad end of this civilization has been determined, at this moment of rise, people are still excited about it.

This is the eagle wings, broken into a butterfly!

This is a kind of excitement, a wonderful beauty brought about by the progress of civilization.

Species are different, but emotions are related, and each species has the right to pursue a better life.

From them, people seem to see the shadow of their own rise.From the Renaissance to the Enlightenment to the birth of modern science, every advance in humanity has not come easily.The people here are moved by their own progress, and by the efforts and efforts of the pioneers.

The history of the Knicks civilization is heavier and more repressive.

Human beings have not experienced such a cruel stage, but every moment of history of the Knicks is experiencing cruelty.

And the appearance of electricity is really as warm as the new sun.

They finally saw something called “Hope” being born!

They can finally get out of the energy trap.

They can finally stand up in a world without fire!

A machine called the Geothermal Steam Generator began to spread widely, and the rulers who prevented its spread ... were directly put on the guillotine by the insurrectionary army!

This is an unrivaled trend!

The magma is still magma in essence, and there is not much change, but at this moment there is one more function... power generation!

" Geothermal steam generator", like human fire power plants, can convert heat energy into electricity through steam.This is a small step, but it has achieved a huge leap in production capacity.

magma does provide huge heat, but heat is a less-than-use energy source for industry.

And the magma emits heat all the time, causing a lot of waste.

If you use it to generate electricity and build a large-scale power station, the energy that can be used has increased by more than a hundred times.

In the era of electricity in the Knicks civilization, the development was extremely rapid, and electricity began to quickly replace the original magma heat energy and become a stronger energy source.