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440 million years ago, the nautilus, which was more than ten meters long, was the top predator in the ecological chain. However, during the mass extinction at the end of the Ordian period, not even a single one of them survived. 370 Million years ago, the terrifying monster Dunkleosteus appeared that was more than ten meters long and weighed more than four tons. However, in the face of the magma called the "super mantle plume" in the Devonian period, they could only become large grilled fish. 250 Million years ago, during the 8-million-year-long volcanic eruption in the Permian, 90% of species disappeared forever. Trilobites, which had escaped two mass extinction disasters in succession, were not spared this time. 65 Million years ago, the age of dinosaurs, which had ruled the earth for 160 million years, also came to an end. The dinosaurs who lost food died in despair from cold and hunger. After that, human beings evolved through continuous labor and stood out among the many creatures on the earth to become another "ruler of the earth" with "a small body but a flexible mind and omniscience...". In the 23rd century AD, a group of biologists made a major discovery. An experiment that accidentally discovered that humans can choose their own evolutionary path was recorded in history. Not everyone can succeed, but those who succeed have far better physical fitness than ordinary people and strong adaptability, and even have superpowers that only appear in movies... The West marveled for a while that "this is the creation of gods", while more people are more willing to call it the "nirvana" of mankind. In the 41st century AD, the earth's environment is no longer suitable for ordinary human habitation, but people don't care. Everyone living underground has joined this evolutionary path called "Nirvana", with fanatical eyes and no hesitation...