From a biological point of view, the meaning of human life is to "pass on genes", that is, "reproduction". In a complex and changeable environment, one's own genes are passed on, and the emergence of intelligent creatures like humans adds more possibilities to the future of life, because in the future the earth will gradually become unsuitable for life to survive, and humans will use the help of High-tech spacecraft can leave the earth and go to the universe to find other habitable planets so that life can spread throughout the universe.