The temperature of the earth has dropped to a limit, and it is impossible to continue to cool down, and the whole planet is like an ice hockey puck, and the once lush forests are now only left with ice crystals.

According to the time calculation, the increase in the earth's oxygen content has reached the limit, and the possibility of further increase is very small, but it will take at least 300,000 years to reduce it to 21% of the previous level.

But the deduction is only a pretended imagination, thousands of years later, the earth's oxygen content has reached an unprecedented 46%, and the oxygen content has been steadily increasing, perhaps exceeding 50%.

Even the Carboniferous, which once had the highest oxygen content, was only 35%.

Therefore, during that period, the animals and plants grew unusually tall, the forest coverage rate reached 100%, and the spontaneous combustion was very rare.

But why, this time the oxygen content has increased, but the earth has entered the ice hockey era?

Is it because the oxygen content has increased by more than 35% of what it used to be?

Because ice crystals cover the earth's surface, the atmosphere rarely rains, and the climate is dry but unable to spontaneously combust, forests are preserved in their most primitive appearance like specimens.

The temperature is currently at minus 21 degrees Celsius, which is not too low, but humans cannot survive in the wild. The excessive oxygen content has also led to the fact that even if humans can withstand this cold, due to the lack of tools to oxygenate in the wild, it is almost impossible to leave the oxygen balance station to explore the earth that has been dark for thousands of years.

Scientists call this epoch that wiped out almost the entire planet the Age of Ice Oxygen.

This century has passed 1,100 years since the Anthropocene.

The oxygen balance station has also been expanded a lot, and when the oxygen content increased sharply, it was too hasty and there was no way to deal with it, resulting in a decrease in human beings. The superpowers then hastily established a balancing station, but humanity was drastically reduced by the sudden increase in oxygen levels, the reduction of carbon dioxide due to the destruction of the atmosphere, and the sudden drop in temperature.

The oxygen balance station is only a palliative solution, and although the oxygen suit is manufactured, the high manufacturing price discourages many people and reduces it to the toy of those who have money.

But it's not all bad.

Mammals are basically extinct, humans have become the mortal enemies of insects, and natural selection, in this case, some human institutions have undergone earth-shaking changes. Perhaps it is because the large amount of oxygen and the lack of carbon dioxide make their cells overmultiply, and after continuous fusion, they become a new kind of cell that can perfectly integrate this concentration of oxygen.

This part of the people is called: icebreakers.

The increase in oxygen content leads to the acceleration of the reproduction and aging of blood cells, and the average person may become old at the age of thirty or forty, and the average life expectancy is naturally reduced by nearly half.

The air resistance has increased, and humans are basically unable to survive in the wild without wearing oxygen suits. But again, human beings have become slower, but more durable, and if there is a marathon, it is possible to easily run hundreds of kilometers.

Excessive oxygen levels have changed the world.

A thousand years later, at the end of the human alliance.

The four great powers have produced enough offspring to divide up from then on.

On the top of the Himalayas, the huge balance station stretches out, which is the ultimate base for the Chinese people.

Looking down, the white world under the mountainside hides danger, and the fog is thick, and it is impossible to see it really.

The essence of human beings may be confrontation.

He sighed, looking at the snow-white area under the glass, which was full of danger, he knew that there were huge beetles that could easily tear apart humans, even if there was an oxygen suit, if it was too late to resist, once the oxygen suit was torn apart, humans could not adapt to this level of oxygen, and they would collapse without a fight.

Lin Mo was born in the balance station, he belongs to the new generation of IVF, so he has no biological parents and belongs to the children of the alliance.

He had heard the legends of those icebreakers since he was a child, and in his heart those icebreakers were mysterious and powerful, but unfortunately he had never seen them, not even on TV.

But he firmly believes that he can also become an icebreaker and become the last hope of mankind on earth: it is not only a glory, but also a representative of a great era.

'The latest news from this station, there are only three months left before the second invasion of Mogu, and the alliance sent an icebreaker team of 30 people to enter the chaos area three days ago, and so far, only three people are still signaled back, and the other 27 people ...... the host of the report paused, "There are no vital signs." ’

Lin Mo exclaimed, he knew the Demon Gu, and although this name was given by humans, the Demon Gu was named because it made a sound similar to that of the 'Demon Ancient Demon Gu'. Five years ago, Mogu had led a group of Zerg to attack the Balance Station base in the Himalayas, and although it failed, it caused great damage.

The most terrifying thing is that they seem to have some intelligence, and they actually know how to attack the oxygen purification tank that is hidden deeply.

Lin Mo, as a marginal human, was not qualified to know the location of the purification tank, and the Zerg was even less likely to know.

Strangely, the attack was not as blind as it had been, but had a clear purpose: oxygen purification tanks.

Lin Mo frowned, and secretly wondered, "Is the Zerg evolving again?" ”

The evolutionary history of the Zerg can be described as glorious.

At the end of the Anthropocene, the Glacial Oxygen Age rose, oxygen surged, and all living things except insects were basically extinct. Humanity was able to survive this catastrophe because of its intelligence and technology.

Because of their unique way of breathing, insects are not affected by the surge in oxygen, but rather change due to the change in oxygen content. Their size is unusually large, their shells are even harder, and the largest arthropod insect ever encountered in the record is nearly 100 meters tall!

Biologists speculate that the Zerg may have over-evolved, that is, in addition to simply becoming more powerful, they would even reach a new form: the half-human form.

Lin Mo flipped through the information, but the information he could access was too little, and he could only find out some simple processes about the evolution of the Zerg. For example, engineering insects that form a unified community, have a unified way of acting, and are responsible for different tasks. All this indicates that the Zerg will become stronger and stronger in this extreme environment, until the human race is completely wiped out, and they will dominate the earth!

'Icebreakers are our precious treasure, they bear the great mission of fighting against the Zerg, but there are too few icebreakers, humans can't break through themselves in this oxygen content and become powerful icebreakers, we can't continue to lose them, please don't make unnecessary sacrifices! The host said indignantly.

Lin Mo clenched his fists, glanced at the time, a trace of discouragement flashed in his eyes, grabbed his hat and buckled it on his head, opened the door and left in a hurry.

As an ordinary low-level human being, he found a job, with an unstable salary, and lived in a simple dormitory provided by the company, he did not feel unsatisfied, but he had been missing something in his heart.

At the age of eighteen, he has just come of age, and he is not only strong and full of fighting spirit, but also with confusion and decadence, living on this abnormal earth.

He doesn't have too many friends, but the only two good friends have become people from two worlds because of their different identities and different fission of blood cells.

They seem to have a chance to become icebreakers.

Lin Mo tied up his long hair and walked into the door of the company.

It was exactly nine o'clock.

"Hopefully she's still there, not quitting." Lin Mo thought in his heart and walked to his post.

This is an assembly workshop for the production of oxygen suit accessories, mainly for the production of oxygen suit connecting pipes.

And the director of this workshop, his boss, is the daughter of a company executive, who is beautiful and noble, and often wears a black leather jacket and leather pants to supervise the work. The first time Lin Mo saw her was at the last company meeting, and after he saw it for the first time, he could never forget this woman named Shi Xuelin.

He often stares in the mirror in a daze, with thick eyebrows, big eyes, and long hair, with a hint of light blue in his eyes.

He also thought that it might be because the hair was too long, which caused Shi Xuelin to dislike his style, and wanted to go to the barber shop a few times, but he always hesitated at the door, and finally gave up cutting short.

Shi Xuelin didn't come today, he was a little disappointed, and he worked as numbly as usual.

"Lin Mo."

He looked back.

The bald guy ran over and made a look: "Director Shi didn't come, I'm not happy." ”

Lin Mo smiled.

The bald head said: "It's normal not to come, I said that my uncle works in a bar, and there is often gossip, and at this time, Director Shi is studying the gap." ”

Lin Mo said: "What gap?" ”

"Well...... this"

Lin Mo grabbed his bald head: "Little Ou, you just say it, what are you selling." ”

Xiaoou is five big and three thick, and it doesn't match the name, so he glanced left and right: "Don't say it." ”

"Did you know me on the first day?" Lin Mo snorted.

Xiao Ou said: "It is at the No. 3 gate near the cliff in the north, there is a gap, Shi Xuelin is a person who has been to the field in an oxygen suit, and she is the granddaughter of the old commander......

"I know it all." Lin Mo easily pulled the little gull closer.

Xiaoou sighed and said, "Don't be so hard, I see that you have lost a lot of weight recently, why haven't you lost weight with your strength?" ”

Lin Mo didn't answer, urging him.

Xiaoou said: "What I said is that there may be Zerg mixed in, but Zerg can't hide, they are not people after all." After the investigation, I planned to send a group of people down from that position to see, but I said, the cliff is too hanging, how can I go down, unless the icebreaker ......"

Lin Mo muttered: "Of course the Zerg can't be mixed in, although they have evolved enough, they are still insects after all. It's just that it's too dangerous to go down in that position, isn't the icebreaker unfavorable recently, and only three of the thirty icebreakers last time still have activity signals. Oops, Oop, I think of a terrible thing! ”

"What's ......?"

'Alert! Suddenly a loud horn sounded in the workshop.

Lin Mo and Xiao Ou raised their heads together, and Xiao Ou couldn't help but smile bitterly: "This secret is not a secret anymore. ”