After completing this step, another voice sounded in his head, "Brain domain development ability activated." ”

He found ...... My abilities have finally evolved! The discovery brought tears to his eyes.

"Finally, it's not the stupid, more powerful 'God' who can only move meteorites and cause natural disasters."

"Yes...... Feel free to read and inject thoughts! ”

Yu Yifeng clenched his fist fiercely.

This ability was so powerful that he was able to inject the idea ...... universe from the Big Bang directly into a primitive.

"What the hell is this...... Isn't it possible to complete the question directly? Yu Yifeng's heart blossomed, and he had some doubts in his heart.

With this mentality, he definitely wants to give it a try.

Soon, he cheated and injected the idea of the "Big Bang" into a primitive man who was looking for food.

Outcome...... A scene of crying and laughing was born.

At this moment, this primitive man had some strange thoughts.

"Huh?!"

"Wei Xu digging rice dog? Burst...... Explode?! ”

He made a strange sound in his throat, looked up at the sky, and then looked left and right. The primitive man found that there was nothing around, and his eyes flashed with doubt. Immediately after, he touched his stomach and felt a little hungry.

He could only continue to look for his own food as if nothing had happened.

“？？？”

Yu Yifeng was silent, a little incomprehensible.

Then read his thoughts.

"Grass!" After knowing the truth, Yu Yifeng hugged his head and almost grabbed a handful of hair.

This primitive man had no idea what the universe was, nor what the Big Bang was, and all he wanted was to eat...... And...... Copulation!

They haven't even formed a real language yet!

Therefore, after injecting this knowledge about the "Big Bang", primitive people could not understand it at all!

“…… It shows that this 'injection' is not a panacea. It can increase knowledge out of thin air, but it can't forcibly change a person's mind, and it won't make him smarter. Yu Yifeng said in his heart.

He thought about it for a long time, but he couldn't find a loophole that could be exploited.

Moreover, the "Injection Mind" was extremely physically demanding, even higher than pushing a meteorite, and he was in a state of near deprivation all of a sudden.

Yu Yifeng frowned, and then sighed again: "The topic of marginal civilization is really not so easy, there are no bugs to find." Directly brainwashing the whole nation and believing in the Big Bang, it seems that it will not work, and the physical strength is completely insufficient. I can only brainwash a few people at most. ”

Next, we can only develop step by step.

In order to make the operation more detailed, Yu Yifeng specially modified the speed of time from the original "one second = 100,000 years" to "one second = 10 years".

I don't know what's going on, his brain seems to be able to really accept so much information.

"Information for the whole planet. This should be what is called...... Is the intellect developed to its own limits? The ability to receive and process information has been greatly improved, and the ability to operate has been enhanced, but I did not expect it to be realized in this place. ”

The slowdown in the passage of time has both advantages and disadvantages. The advantage is that it can be controlled more carefully. Harm...... It means that the recovery of his physical strength has also slowed down significantly, and it is impossible to rest for tens of thousands or even hundreds of millions of years at once as before.

Yu Yifeng frowned and pondered secretly: "The setting of physical strength means that most of the social evolution can only rely on natural evolution. I can only pry a little bit at a small number of key points to achieve butterfly benefits. The best thing to do is to change some of the key people ......"

He figured out the key points. Of course, figuring out isn't necessarily the best way to do enough.

The evolution continues......

After the birth of intelligent beings, tribes were quickly formed as clans. With a small amount of thinking injected into Yu Yifeng, higher levels of social interaction and language emerged, both of which could further stimulate brain development and improve their intelligence.

The appearance of these creatures has also begun to get closer and closer to Homo erectus from the original reptiles.

I have to say that the body shape of Homo erectus, in the primitive era, was still very strong.

On the one hand, the minions degenerated, evolving fingers, which were more suitable for using tools; On the other hand, fighting in an upright state is easier to gain an advantage and can have a farther and more comprehensive vision.

For example, when tigers, bears, orangutans, dogs and other animals fight against their own kind or other opponents with strong fighting ability, they always strive for a higher position and attack from top to bottom.

Therefore, although the environment in the greenhouse of modern society has given birth to a large number of weak otaku, in primitive society, Homo erectus's fighting ability is not weak. Although it can't beat the top goods like the silverback gorilla, it is not difficult for an adult primitive Homo erectus to take on a wolf, leopard or other lightweight creature alone.

Time passes, time passes......

Witnessing the jungle fights one after another, Yu Yifeng's faint worries about the inappropriate path of evolution gradually disappeared.

"What a sinister marginal civilization. If you choose a jellyfish-like evolutionary path, you may become extinct halfway because you don't adapt to the environment. Homo erectus can stand out, or there is a reason for it......"

Then came the larger tribes, stone tools, tires, spears, bows and arrows......

One hundred thousand years, two hundred thousand years, the primitive Blue Star people began to occupy a larger territory. The further development of stone tools brought them to the top of the food chain.

Sometimes, because these people's living environment is too good, they don't seek flexibility, and Yu Yifeng will also cause a series of natural and man-made disasters to force them to go farther away.

"Wisdom, to cultivate greater wisdom."

In hundreds of thousands of years, this civilization began to flourish, and the footsteps of the Blue Star people were almost all over the world.

"It's good to have a large area, at least it won't die because of a plague." Yu Yifeng thought.

However, these Blue Star people still have the inferior roots that intelligent life usually has, which is a big trouble.

Then the town appeared......

The drain appeared......

The text appeared.

This is followed by mathematics.

Then came slavery......

The entire civilization became more and more blossoming, not as ignorant as before, and Yu Yifeng began to tremble and restrain his strength, carefully caring for this development.

The ancients were very stupid, in case of some inexplicable natural phenomenon, some god, god or something immediately ran out again.

The overall atmosphere of "science" is not like "language and writing", where it is enough to forcibly inject ideas, but is a humanistic phenomenon caused by the social environment. He still hasn't built it.

"But there's no rush for now...... Take it a slow. ”

After careful statistics, he, the "god", can only be injected with thoughts every one or two hundred years. At full health, it can be injected five to six times in a row......

With a massive increase in brain volume, he can already inject more and more esoteric knowledge.

Therefore, Yu Yifeng is determined to settle down, accumulate a period of time, and give time for independent development in various places.

Then come a one-time large-scale thought injection, so that it is powerful.