World War I took place in August 1914 AD. The main weapon is a rifle.

World War II took place in September 1939 AD. The main armament is an aircraft tank.

Third ......

The Fourth World War took place in the 26th year of the 'New Calendar'. The main weapon was a spear, with stones.

————

Ten thousand years later.

"The Third World War has become a mystery, we have forgotten when it started and when it ended, it just became the dividing line of history. The time before the Third World War was ancient; After the Third World War, it was the New Era. From ancient books, we can vaguely glimpse that human beings 5,000 years ago, struggling to survive on a scorched earth, the whole world united to fight against something called radiation......

We can draw conclusions. After the Third World War, it took 5,000 years for humanity to heal such wounds. And we are still alive and healthy, which is the selfless and great contribution made by the ancestors of medicine to mankind for 10,000 years in the 'new calendar'. From ancient books, it can be seen that human beings in ancient times were afflicted by diseases. And the development of the new calendar for 10,000 years to the present, disease, has become history. A medical pioneer once said that there is a certain antibody in the human body, but it is unknown......

From ancient books, you can see some legends about ancient times. It was a kingdom of God, highly technologically advanced, and we don't know how advanced it was. But war scientists have come to the conclusion that ancient humans before World War III were able to invent weapons that destroyed the entire world. Not in 10,000 years' time.

War became the dividing line of history.

10,000 years have erased the painful memories of human beings.

10,000 years have also erased the beautiful memories of mankind.

We no longer remember any pain that has happened, and we cannot remember what was good? We can't imagine what kind of paradise ancient humans lived in before World War III. Extreme thinking cannot guess how happy human beings were at that time.

Students, this is "Introduction to World History". Must-have questions, remember a few of the most important key points: Before World War III, it was ancient times. Colloquially known as "Age of Paradise". After the Third World War, 5,000 years before the New Era, history called it "The Age of Pain". Five thousand years after the new calendar, it is collectively known as the "Rise and Revival Era" ......"

Kyushu Empire, Southeast Prefecture, Hangcheng County.

The wind was howling, and the yellow sand was flying. In that endless sea of sand, there is an endless stream of pedestrians, all accustomed to such wind and sand. It's just a veil to cover the mouth and nose, and it's unremarkable.

Legend has it that in ancient times, this was a place of beautiful mountains and rivers. Modern people naturally don't believe it, look at this continuous sea of sand......

In Hangcheng County Public High School, the third year of high school class is quiet, and every student listens attentively to the history teacher explaining the history of the world.

Five thousand years after the new calendar, from the princes and nobles to the peddlers and pawns, everyone's heart is full of fiery ambition, and there is a great dream of revival hidden in the depths of everyone's soul. Everyone fantasizes about being able to revive the humble world of today towards the ancient times of 10,000 years ago.

If you want to revive, you must know enough about the history of ancient times.

"Li Zhen, do you remember a key word in the teacher's statement just now? According to the research of archaeologists, what kind of weapon was destroyed in the third war? ”

The history teacher smiled and asked by name.

The classmates all turned their heads and looked at the last row with a playful look, the thin, almost naked teenager who was just tied to a few rags in key parts.

Li Zhen stood up, with unkempt hair and a yellow-skinned face, but he couldn't hide his scorching and deep gaze:

"Nuclear."

"Hahahaha."

The class burst into laughter, and all the students laughed with stomach pain:

"Are you stupid?"

"And? And what is it? ”

"You're so cute, which history book says there is such a weapon? If you want to say that 'guns' are such legendary weapons, we still barely believe them. ”

"And? Or the river? What do you mean, is there such a weapon? ”

"Li Zhen, what kind of school do you go to, isn't it good to pick up garbage obediently?"

“……”

The history teacher looked like he hated iron but not steel: "Alas. I obviously said that it is a kind of thing called radiation. What and discord? ”

Li Zhen's face was flat, not sad or happy, and there was no change because of the ridicule of his classmates and the sadness of his teacher. Word by word:

"Nuclear. The weapon that destroys the world is called nuclear. 5,000 years ago, humans resisted a type of radiation whose full name was 'nuclear radiation'. 10,000 years ago, mankind invented a weapon to destroy the world, the first generation is called 'atom', and the second generation, it is called 'hydrogen'. The third generation is called 'neutrons'. The fourth generation is called 'Three Phases'. The four generations of absolute weapons are collectively referred to as 'nuclear'. And 10,000 years ago, the world was destroyed by nuclear weapons. ”

The unhurried tone and tone made the classmates a little quiet, looking at each other, not knowing how to react.

The history teacher pushed his glasses, and he was a little stunned in his heart, he couldn't grasp the accuracy of this answer. I once saw in an ancient book that someone mentioned that there was a weapon called 'atom' in ancient times.

And Li Zhen said it so unhurriedly, very steady, not like a casual person.

This is the case in the mainstream of the world, and no one can easily and arbitrarily reject a statement.

The 10,000-year-old modern human race of the 'new calendar' has too many unsolved mysteries about the past. It is difficult to say the correctness of what a person suddenly said, it is possible that he has discovered some ancient books, it is possible that he has learned something that you do not know......

After being silent for a long time, the history teacher frowned and asked, "Then what effect will it have after the release of the 'nuclear' you said?" Why is it possible to affect the whole world? It is said in ancient books that the whole world was a sea of fire at that time, like the wrath of the gods. It is said that the world was once a vast oasis, but what kind of weapons can be released to make most of this world now a desert? Can you explain? ”

Li Zhen did not hesitate, moved out of the desk with bare feet, and strode to the podium.

Picked up the chalk and stood in front of the blackboard, looked at the silent classmates in the class, and said loudly:

"It seems that no weapon in the ordinary conventional sense can destroy the whole world. No, you can. It's just that we haven't seen it now, and we can't imagine what it is. Teacher, the greatest weapon now is called a bomb, right? Able to produce violent explosions, creating fire. ”

The history teacher nodded, "Yes." This is a concept proposed by a student at Imperial College 50 years ago, and was studied by scientists 20 years ago and called it a bomb. Something the size of a fist can spread to a radius of more than ten square meters after an explosion. ”

"And nuclear. For the same size, it can destroy a city. ”

Hiss –

"Impossible!"

"How is this possible?"

“……”

The students exclaimed, this is a concept that they could not imagine at all.

The history teacher's eyes also widened suddenly, and he looked at the problem from a rational point of view. The weapons that destroyed the world in ancient times may really be unimaginable.

"You know?"

The history teacher asked.

Li Zhen picked up the chalk and wrote a few words on the blackboard - nuclear fission!

"What is nuclear fission?"

Li Zhen said lightly: "I don't know what the atoms and neutrons contained in it are." But the principle is that when they collide with each other, a phenomenon of nuclear fission occurs. It will fission in an extremely terrifying attitude, and the geometric multiplier will rise. If one atom is fissioned, one will be split into two. Then the division continues, and two will become four again. Four will continue to fission, and four will become sixteen again. Sixteen continue to fission, and it becomes two hundred and fifty-six.

It only takes a split second for an atom to split into billions of billions. This is an extremely terrifying geometric multiple fission. This is called the nucleus. And after a nuclear fission explosion, the resulting heat can incinerate the world and turn everything into scorched earth. The area touched by the nuclear will produce nuclear radiation, and there will be no grass for thousands of years......"

Everyone opened their mouths wide and looked incredulously at the rows of Arabic numerals on the blackboard. 2*2=4.4*4=16.16*16=256.256*265……

Is this the formula for nuclear fission?

The history teacher opened his mouth wide, slapped the table excitedly, and shouted, "Yes, that's right." That's it! ”

Everyone looked at the history teacher, and they couldn't figure it out in their hearts, could it be that Li Zhenmeng was right?

The history teacher said excitedly: "I once read an ancient book more than 9,000 years ago, and it was not far from ancient times, and people at that time knew better what happened at that time. Some people have mentioned that it is called a 'fission explosion', which is a phenomenon in which 'neutrons' hit the 'nucleus' and cause fission...... But so far, no one knows what the neutron and the nucleus are. I remember, you're right. It turns out that this is the calculation formula...... No one has ever said exactly how fission is and what fission is. And the point you said, I think is the closest to the truth so far. ”

Li Zhen nodded: "So, the world is destroyed by the nuclear." ”

'Bang Bang Bang'

The students gave heartfelt applause, and they were dumbfounded, wondering how such a teenager who relied on picking up garbage for sanitation could tell so many 'unclear' secret things.

Li Zhen stepped off the podium, and at this time, the bell rang for the end of school.

The history teacher hurriedly shouted: "Li Zhen! ”

Li Zhen turned around.

"Where did you learn these things? Which book did you see it from? Tell me, this is very important, maybe let the scientists of the Kyushu Empire take the lead in studying what the world is destroyed......"

Li Zhen thought for a moment and showed a smile that made people feel a little inexplicable: "Someone else told me." ”

"Who?"

"The man of my dreams."

“……”

The smile was bright, and the look in his eyes was a touch of tenderness......