The Earth's Core Cools, Seeking Life from Nuclear Fusion

[Rebirth+Climb the technology tree+Escape➕Interstellar Exploration] In 2031, the Earth's core cooled rapidly. Human civilization has perished. At the last moment, Su Yunfei was reborn and returned to six years ago. … This time, he entered the scientific world with materials science. Controllable nuclear fusion, space elevators, aerospace aircraft carriers, and bases on the back of the moon. The brilliance of energy weapons, the splendor of kinetic energy weapons, the mystery of curvature flight, and the strength of dimensional creatures. Su Yunfei: "Let's directly upgrade this two-dimensional creature to another dimension and see if he can still be arrogant." … Mysterious creatures in Titan's methane ocean. Invasion of Centaur Civilization. The threat of the dark forest. The dangers of advanced civilization. … In the endless vast universe, human beings will not stop here.