Seventeen thousand and sixty-two planes evolved from protein macromolecules to the first ape to use stones within their respective time and space, and the billions of years that had passed were just a flick of a finger in the eyes of Yun Yao and Gaia.

One of the countless streamers in Gaia's hand swooped into one of the many planes, and it was a lifeform grabbed from the same place as the current plane's life form, a human named Gu Guo.

Gaia smiled: "After adding variables, maybe you can drive the people around you to give birth to more variables, so that this plane can be permanently fixed in the sub-ruins." ”

Yun Yao nodded, her high-dimensional consciousness body was moving away from the sub-ruins and returning to the fertile soil, and the reverberating spatial strings echoed in Gaia's consciousness: "Gaia, I'll leave it to you next." ”

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Gu Guo stood at the intersection of the small river and the big river, and the turbulent water of the small river in front of him flowed into the big river, rolling up a few whirlpools, and the fallen leaves swirled in the whirlpool, and then were thrown into the distance by the water of the big river.

The river is very wide, the fog on the river surface has not completely dispersed, the scenery on the opposite bank is not real, Gu Guo can't estimate the width of the river, at least two or three hundred meters. The water was deep, and the banks of the river were a gentle slope with a little mud and sand, which he guessed was the height of the water at high tide of the river.

On the bank of the river is a plain, high in the west and low in the east, with a wide view, and since the river is at a low level, there is no need to worry about the rising river flooding the plain when the rain is overflowing.

The meeting place of the tribe was in the lower reaches of the Great River, and the group had to walk all daytime to reach the place agreed upon for decades.

Along the way, Gu Guo did not forget to look for those plants that could be domesticated by humans, and now he only saw plants that grew like barnyard grass of wheat, and Hua said that the seeds of this kind of thing were bitter and hard, and it was easy to not be able to pull out if he ate too much.

Hua didn't understand why his nephew put such an unpalatable thing in a bamboo basket, and the tribe already had delicious broth and grilled fish, so why did he collect unpalatable and uneaten grass seeds?

Gu Guo told the people that in the future they would plant grass like this on the land, and said that these grasses could produce small fruits that could be eaten.

The clansmen shook their heads one after another, it was true that they could eat it, but the taste was far inferior to fish and meat, and they didn't know why Gu Guo was so obsessed with looking for those hairy grasses, so they didn't take this matter to heart.

There are more important and joyful things waiting for them.

The topic of population reproduction, if you mention it to a person living in the 21st century, the magnetic voice of Mr. Zhao Zhongxiang will definitely ring in his ears: "Spring is coming, everything is recovering, animals are mating season again, and the air is filled with ......"

But for humans living in the Neolithic Age, the reproduction of the population was a sacred matter, and in order to avoid the birth of deformed children by close relatives, sexual topics should never be mentioned in the tribe, and even some pornographic jokes were taboo.

As they approached their destinations, it seemed time for the young people to free their bestial nature.

Young men said some meat jokes, and sometimes made some men know how to laugh, in Gu Guo's opinion, the yellow jokes in the mouths of men in the later generations are the parents who make fun of women for a short time, and there are some frivolous words. For example, which tribe's women have big buttocks and are easy to raise, which tribe's women have big breasts and more milk, and so on.

The primitive sex cult did not have the bells and whistles that Gu Guo had developed for thousands of years in his previous life, it was just for the better reproduction of creatures.

The young women's faces were flushed, and they fantasized about the good men of other tribes, stimulated by the words of the men of the same tribe. On the wide river, a carp jumped up, as if trying to cross the non-existent dragon gate, causing the women to exclaim, I don't know if it was because of the carp on the water, or because of their expectations for the future.

On the third day, in addition to more than 30 pottery coins in Gu Guo's bamboo basket, there was also a full layer of grass seeds, which was all his harvest in the past three days.

Cultivating crops is a relatively long thing, and even if he makes colchicine to speed up the progress, it will not be completed in a day or two. Farming is an important part of tribal settlement and the development of civilization, and without the fixed output of the land instead of hunting, the rise of a civilization will become a rootless pine.

More than half of the four characters representing the feudal dynasty are land and grain, which can be imagined the importance of crops to civilization.

He wants to grow these grasses, which he doesn't know what they are called, into food that can make people hungry.

After two days of trekking, the tribesmen finally reached the foot of two hills this morning.

The stone at the front hurried back and told the people at the back of the group that he had met two groups of people from other tribes in front of him.

The tribesmen quickened their pace and followed behind the stones.

Before everyone could get closer, a whining sound came from the grass from afar.

Seeing a group of people approaching, the people in the haystack stared vigilantly at the comers, and they were stunned for a while.

They saw a group of people coming towards them, all carrying baskets made of bamboo strips, which were not in their tribe, and they were all made of animal skins.

If they could recognize that the bamboo basket was used to hold things, they could not recognize the clay pots and bowls in the bamboo baskets.

There was also a crescent of wood that the men carried in their hands, which could not be used as a spear for hunting or as an axe to cut down trees. It wasn't until Gu Guo and the others approached that the people in the haystack saw clearly that there was still a rope tied to the ends of the wood bent into a crescent.

The two tribes in the haystack came out with a few old men, who recognized the stone and the priest's mother, with a look of joy and surprise on their faces, and the young men of the two tribes breathed a sigh of relief when they saw that the person who came was known to the chief and priest.

Stone stepped forward and said hello, and he found that there were many wounded lying in the grass, and from the injuries they received, they did not look like the scratches or bites of large beasts, but the appearance of open skin and flesh was more like being wounded by stone weapons.

Gu Guo looked around and found that there were nearly two hundred men, women, and children squatting in the grass to rest, and it stands to reason that the people who came to communicate should all be young people, but the two tribes in front of him were more like moving as a family.

"What's going on?"

When her mother came up to inquire, she realized the seriousness of the matter, and that there had been tribes that had not had enough food to survive the winter before the onset of winter, so they went to rob other tribes of food. This kind of thing was passed down by word of mouth during the exchanges between the tribes, but until the last tribal meeting, no tribe had been heard of being robbed.

Gu Guo asked his mother to untie the clay pot on her back, set up the clay pot with a wooden stick and began to boil salt water. The two jars of salt that he had originally traded were scooped into the clay pot with two full spoonfuls in a clay bowl.

The Neolithic period was so backward in medicine that it could be said that losing a hand or foot in a fight with a wild beast would have basically ended life, and countless people had died from wound infections before the invention of alcohol and antibiotics.

Although the bactericidal effect of high-concentration brine is not as good as that of alcohol, it is better than doing nothing.