As the scorching sun of the day faded away, the night of the seventh day began to descend. The purple morning glory grass still lived peacefully in the ocean, enduring the alternating sun and moon for five thousand years. Meanwhile, with their abundant reproduction and photosynthesis, these aquatic plants significantly increased the oxygen levels in the seawater, creating suitable conditions for the birth of marine animals.

In nature, if there were no aquatic plants in the water, and if it did not flow, it would be difficult for oxygen in the air to dissolve into the water. This stagnant water would not produce a suitable environment for aquatic animals.

Soon, the spores in the sandbox world's ocean and single-celled organisms began to evolve. The first to appear were a group of black crustaceans, similar in shape to the ancient marine species of Earth's Paleozoic era, the trilobites. At this point, marine animals stepped onto the stage of evolutionary history.

"My world sandbox... finally, marine animals have evolved from single-celled organisms. I've been waiting for you for so long, waiting for two mass extinctions." Seeing the animals appear, Xu Zhi revealed a relieved smile. Exhausted from a day and night of waiting, he went back to his room and fell asleep.

When he woke up, it was already the eighth day of the Spore Evolution Sandbox. Anyone who has studied biology knows that the ocean is the birthplace of life, but Xu Zhi discovered that there were already marine animals that were no longer satisfied with the fiercely competitive ocean and gradually evolved toes, scales, and became amphibians, living on the barren coast.

Seeing this, he recorded the rest of the Light and Shadow Era with elegant handwriting. This third era of evolution, which completely should have been reborn after the great extinction, Xu Zhi named the New Era:

[The New Era, welcoming new life, various animals burst onto the scene, the first batch of marine animals appeared, a golden age of species, with invertebrates relying on their shells to dominate the sea for a time. However, their rule was not long, as vertebrate animals were born, using their agility to defeat them. Vertebrate animals became the rulers of the New Era, crawling out of the ocean and dominating for a long epoch!]

Xu Zhi wrote everything down and silently closed the book. The eras on Earth were the Cambrian, Ordovician, Silurian, and so on, but Xu Zhi's eras were the Dark Warrior Era, the Light and Shadow Era, and the New Era.

"It's so fast. I slept for a night, and the spores will soon leave the ocean and evolve into terrestrial species..." Xu Zhi suddenly furrowed his brows. "But to evolve intelligent life, who knows how many long epochs it will take? Since the ecosystem has appeared, why not..."

"Do something?" He was filled with a sense of adventure and mischief, looking at his fingers, thinking about cutting them and dripping blood into the sandbox, allowing some species to absorb the genes and rapidly evolve into humanoid intelligent life...

In the sandbox ocean in the orchard yard, would the beautiful mermaid Naga tribe appear?

In the courtyard of the orchard, a miniature sand table world appeared with the powerful and sturdy Tai Shan tribe of intelligent apes.

"It's really exciting to think about, a miniature sandbox world in the courtyard," he thought, but he quickly rejected the idea of using humans as experimental subjects to evolve intelligent species. "I remember there's a zoo in the city, we could sneakily get some chimpanzee fur, grab some genetic templates, and do something with them..."

He left immediately.

Several hours later, Xu Zhi entered the zoo. Around him were couples showing affection or families of three, parents showing affection while bringing their children to the zoo.

Being single, Xu Zhi stood out.

After all, who would come to the zoo alone to look at monkeys? It's easy to be mistaken for a monkey.

A family of three whispered secretly.

"Dad, look at that uncle... he's bald, but he looks so strong!"

"Don't say that, he's bald and doesn't look strong. He's probably sick, otherwise he wouldn't look so old. A terminally ill person coming to the zoo alone is a pitiful person with no one to accompany him."

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Xu Zhi, in his early twenties, was obviously suffering from the strong side effects of chemotherapy, looking older than his age and with thinning hair. But to say he was pitiful...

He was pitiful before, but now he was having a great time, evolving species was really fun.

"Hehe, believe it or not, I, the bald young man, will have a head of black hair and modified evolution genes, curing cancer and restoring youth the day after tomorrow?"

"But even I don't believe it. Evolution is too slow. My orchard is still in the ocean and land of the Paleozoic era." After researching in the chimpanzee exhibit for a while, he spotted the best-built male chimp and went directly to the administrator, bluntly stating that he was a medical student from a nearby university with a research project assigned by his advisor, and that he needed chimp blood for his graduate thesis.

"Young man, they said you're a laboratory professor's assistant, a top student with extensive knowledge... I believe you." The older man looked at Xu Zhi's thinning hair with a sad and pitying expression. "But the blood of my chimp that I raise is impossible. It's like my own child. Even if you threaten me, give me money, or bribe my superiors, I still can't..."

"Just one tube of blood."

Xu Zhi pulled out 3,000 yuan and put it on the table.

The administrator's eyes lit up. This was his monthly salary. He couldn't help but jump up and say, "Just one tube of blood? I can take out more."

"Brother, just give me one vial," Xu Zhi said with a smirk.

He ran his hand over his balding head, laughing like a devil tempting someone to fall. "Don't worry, I won't tell your boss. And if possible, we can still collaborate in the future. I'm interested in the blood of peacocks and cranes at your zoo."

"Sure, sure," the man eagerly rubbed his hands together. "Supporting university students researching biological subjects is a meaningful thing."

A moment later, Xu Zhi left calmly. After dealing with his orchard, he had hundreds of thousands of savings left over. He didn't know how to enjoy himself, so it wouldn't be used up in the short term. He was rich and balding, but that only made him stronger! With his financial power, he could be so arrogant!

Then he thought for a moment and picked up some white ants he saw on the roadside. After all, ant genes had immense strength and were free...

In the late afternoon, when he returned to the front yard, Xu Zhi was suddenly stopped.

"Hey, you're Xu Zhi?" A beautiful girl riding an electric bike on the rural roadside looked at him.

"I'm Chen Xi. I used to visit your house a lot when I was a kid. I noticed the lights on in your yard at night. Did you come back?" The girl was surprised. "What happened to you? You weren't like this before..."

Chen Xi? Xu Zhi vaguely remembered, "It's because of stomach cancer. Hair loss, low spirits, caused by chemotherapy."

"You have cancer, how can this be..." She widened her eyes, unable to speak for a moment.

Suddenly, she said, "I also got into the same university as you last year..."

"Congratulations." Xu Zhi nodded. He just remembered it was summer vacation and she was back in her hometown.

The thought crossed his mind, and Xu Zhi hurried back. After all, he had been away for half a day and didn't know what kind of terrifyingly reproductive species the insect colonies had evolved into!

He used to be quite hopeless, silently waiting for death. Now, his boring life had become unknown and interesting.

He was high as a kite now!

Creating life, like taking drugs, was entertaining.

"You're leaving, huh." Chen Xi didn't stop him, feeling a bit complicated.

She pursed her lips, looking at her idol, who had always wanted to catch up with him, but now he was clearly running away. His optimism was all fake.

After all, he's bald! He's bald, damn it!! His rare hairline made him feel pity for himself! Chen Xi suddenly felt like his lifelong dream had collapsed. But they could still be friends. He yelled loudly from a distance, "Hey! Come over to my place to hang out, or if you need help, come talk to us." ... Xu Zhinai's head hurt. Why was everyone staring at his head with a sad expression? He had already told them that the after-effects of chemotherapy were a normal occurrence, right? Even if cancer couldn't be cured, stopping chemotherapy would allow his hair to grow back! "Hehe, it's time to evolve a powerful species that doesn't grow hair and let them experience the terror of baldness!" Xu Zhinai scratched his head and walked back to the courtyard, looking at the pond. At this moment, half a day had passed. After the species crawled onto the land, their terrifying reproductive speed had almost covered the entire 100-acre micro-sandbox. The mountains and rivers were full of greenery, and strange and bizarre trees grew on the plains. Animals swam in the rivers. "There are fish in freshwater now, and marine fish have left the saltwater and developed into freshwater rivers." "They've only evolved for ten days, from single-celled organisms to this complex multi-cellular state. They've achieved biodiversity and evolved into an entire ecological world. It's simply terrifying how quickly they reproduce and evolve." This was already a small sandbox world. If the insect nest didn't limit their breeding range and prevent them from leaving, they might cause a species invasion on Earth. "So, let me randomly select a lucky one now and proceed with a species extinction event, adding chimpanzee and ant genes. Survive and you'll be reborn, becoming the ancient insect ape clan in my sandbox in the backyard..." Xu Zhinai wore blue plastic shoe covers that he had bought and walked into this huge 100-acre experimental field. Along the way, he had no idea how many small green trees and animals he had stepped on and killed. He didn't care at all. "This is the survival of the fittest. If you're crushed to death by me, it can only mean you're unlucky and eliminated by nature." He squatted down and silently looked at the species one by one. "I'll select the one with the most potential and evolve them into intelligent apes." He thought for a moment, then added, "Hmm, it's best if they're bald."