Repeaters get up very early in the morning.

Because of the review of the school's early reading, some of them even started at half past six.

In the early morning of summer, Liu Chang opened his sleepy eyes, woke up the snoring fat man and the glasses that read the novel all night last night, and went to the bathroom to wash up with toiletries.

As for Liu Tao, a good student, he has long since disappeared.

After washing up, Liu Chang walked to the door of the dormitory building and saw the foggy sky at first glance.

Summer mornings are supposed to be less foggy, but there have always been foggy days in the past two years, and the fog in the past two years always has a hint of pink, which will give people a strange feeling.

But anything strange goes on for a long time, and it becomes strange. Since the fog has been this pink for the past two years, and the weather forecast also introduces that this is just an ordinary "condensation nucleus" phenomenon, no one cares about this kind of thing in Chinese who are used to eating gutter oil.

Walking out of the dormitory building, Liu Chang drowned his body in the mist, and smelled sweet breath in his mouth and nose.

I walked all the way through the fog to the classroom and started the day.

Gratgy, groggy.

The morning passed, and Liu Chang didn't know what he had read, only remembered that he had been reading. He felt that this kind of life was so boring that he wanted to die, and he felt that everyone who lived a repetitive and monotonous life was a walking corpse.

Liu Chang longs for something exciting, eager for something to change.

Looking out the window, the pink mist still hadn't dissipated, and breakfast time was passing in a daze.

And just like that, the first lesson began.

It's a biology class.

Since last year, biology has inexplicably been prescribed as a compulsory course by the state -- not a matter of science. And the most bizarre thing is that the college entrance examination score of biology is set at 200 points by the national hard surname, which directly exceeds the number of languages and has become the first course.

This is unthinkable to everyone, but the hard surname rules of the college entrance examination also make the weight of biology classes suddenly become particularly important.

But fortunately, Liu Chang still likes biology, so he didn't take this first class so muddy.

"Today, I will review again the compulsory test point of the college entrance examination - the Cambrian biological explosion."

"This is the scope of the exam every year for the past two years, and no matter how many times you review it, it can't be overstated."

The teacher who spoke on the podium was the teacher who put Liu Chang and the others to sleep last night, he was very young, white and clean, wearing a pair of black-framed narrow-rimmed glasses, and he didn't talk much during the lecture, but he was very able to cut to the point.

"The Cambrian explosion of life is one of the top ten puzzles in the scientific community today, and the sleeping classmate's tablemate called him up and asked him to answer what the Cambrian explosion of life was all about."

The biology teacher pointed to Liu Chang's side, who was stunned for a moment, and then woke up his sleeping tablemate, Glasses.

"The teacher asks you a question, what is the Cambrian explosion of life?" Poked his glasses with his elbow, and Liu Chang whispered to the teacher at the same table.

The dream was disturbed, and the glasses reluctantly stood up, helped the glasses that were crooked because of the long lying time, and rubbed the folds on his face that were pressed out by the clothes, and then muttered: "The Cambrian explosion of life is probably hundreds of millions of years ago, a sudden evolution of life on earth." The rate of evolution is hundreds of millions of times that of the previous one, as if there was no higher life before that, and suddenly after that, it seems that all the existing species on the earth were produced during that period. ”

"What about hundreds of millions of years ago? From what form did life evolve and what form? These are all test points, and there are specific numbers to remember. The teacher waved his hand and sat down with glasses.

"But you're right, but it's important to remember that during the Cambrian explosion of life, not only did all species evolve faster than light, but new species also evolved faster than light. The ancestors of almost all the present species were formed in that period, sponges, coelenterates, gill draggers, leaf pods, brachiopods, molluscs, arthropods, echinoderms, chordates, etc., and now, all species were produced in that era. ”

"Creation is amazing! The advent of the Cambrian period is a powerful argument to refute Darwin's theory of evolution, and Darwin himself has always wondered about this matter. ”

"Teacher, are you questioning Darwin's theory of evolution?" In a corner of the classroom, a loud voice came out - it was Liu Tao, a good student.

"Uh, yes, why not?" The glasses teacher smiled and said: "The three levels of arguments, nonsense-theory-law, Darwin's theory of evolution is just a theory, why can't you question it, you can also question it, not to mention that he himself has questioned it." ”

"Since I've talked about it today, although it's not a test center, I'll mention it in passing. It's about the cause of the Cambrian explosion of life. ”

"The argument that is now valid in the academic community is that the earth suddenly produced a large amount of free oxygen, which led to the massive, widespread and rapid evolution of living things, but I feel that this argument is also full of holes. If oxygen is alone, how can living things reproduce and evolve at the speed of light? ”

As soon as the teacher on the podium had finished speaking, the classroom suddenly went dark.

"What's going on?" Liu Chang looked out the window.

The fog outside the window suddenly thickened!

That's what makes the darkness dim.

The pink mist outside had not subsided since the morning, and now it suddenly became thicker, and the huge mist filled the entire outside world, like a large piece of cotton stuffed into the whole heaven and earth, blocking all the light.

Perhaps because the fog was so thick, the originally pink mist gradually turned crimson, and then over time, it turned into a blood-red patch at a rate visible to the naked eye.

The sunlight was completely blocked out, and the whole world was turned into darkness.

Or rather, the darkness with blood red, the world turned black and red.

This weird color gives people a feeling of palpitations, Liu Chang turned his head to look and found that in the current classroom space, every student's face is black and red, and the facial features are blurred, which makes people palpitate.

If it was just darkness, there might be noisy classmates yelling, and maybe even naughty boys taking the opportunity to touch girls' buttocks, but in this environment, no one dares to speak.

Because the world is dark, everyone has experienced it.

But the world is bloody, and no one has ever seen it.

Every student saw the frightened expressions on the faces of the others, no one dared to speak, and the whole classroom fell silent.

"I'll go to the Registrar's Office and see what's going on?" In this solemn atmosphere, it was the biology teacher who was the first to react.

He put down the sentence, opened the classroom door, melted into the blood-colored fog, and disappeared in an instant.

"Look, the fog is drifting in." The fog was so thick and colourful that it was clearly visible to everyone when they came through the cracks in the windows and doorways.

The glasses sitting next to Liu Chang saw this scene and subconsciously covered their mouth and nose.

"It shouldn't be poisonous, and even if it's poisonous, how long can you hold your breath?" Liu Chang saw the red fog floating in front of him, sniffed it with his nose, and then smelled a rich fishy sweet smell from inside.

"It smells weird!" The classroom had changed from quiet to noisy, and everyone began to talk about the strange weather after a period of fright.

"What the hell is this?"

"The blood-colored fog, I guess there will be a lot of car accidents out there."

"The fog is so thick that you can't see what's going on outside!"

"Make a phone call and ask about the situation at home." Liu Chang took out his mobile phone and dialed his mother's number.

He was greeted by a busy voice――――――

"The call doesn't go out!" Liu Chang looked at the strange fog outside, and felt a panic for no reason: "Could it be that this thing can still block the signal?" ”

"I'll go out and see how it goes!" A bold student beside Liu Chang stood up and walked to the door.

And this action of his also attracted the attention of all the students, and after he walked outside the door, everyone ran to the window and watched his situation.

The visibility outside the window was less than five meters, and the bold student had just come out and had not taken two steps before his figure was blurred.

"San'er, don't go any further, I won't be able to see you if I go any further." A classmate who was on good terms with him shouted out the window.

"Oh! Okay, it's so red outside, I can't see anything, not even the teacher's office. The "San'er" outside the door also shouted back, his voice forming a small ripple through the mist.

Subsequently......

The air responded with another ripple, and a flock of small sparrows rushed through the thick fog in the direction of the source.

"Whew"——

The usually timid sparrow was as fearless as a bomber at this time, and crashed into the cheek of "San'er" at a fast speed.

Smack!

When the first sparrow and "San'er" made a strange sound like breaking a tomato, and then the strange sound of "snapping" continued.

Liu Chang opened his eyes and saw that after the first short scream, San'er's entire face was pecked through by the sharp beak of the sparrow, and then it was swarmed by the flock of birds that followed. In less than a moment, his entire face was ruined into a mess of watermelons.

"Ah――――――――――h

San'er screamed loudly, and the person was pushed to the ground by the successive impacts.

However, his screams lasted for a short time, and then he may have sucked his own flesh into his trachea or mouth, and the "San'er" lying on the ground could no longer scream, only the "gurgling" sound that came out of his throat.

And those usually docile sparrows, in this "clucking" sound, pecked at those fresh flesh and blood on the spot.

The classroom was really shocked and frightened this time, and all the students were stupefied.

Even in horror films, they have never seen such a terrifying scene.

The classmates who were still alive just now are squirming on the ground at the moment, but the usually timid sparrow is doing the most bloodthirsty thing. At this moment, no one dared to go out to stop the group of sparrows, or rather, no one in the panicked crowd wanted to do this.

Everyone was stupefied.

It wasn't until the well-fed sparrows flew away, and it wasn't until the people on the ground stopped wriggling that anyone came to their senses.

"Can anyone tell me what the hell is going on?" Standing next to Liu Chang, the glasses muttered to himself as if he was scared.

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