Are we moving to a new planet in China?

Interstellar migration is still in the theoretical stage and needs the unremitting efforts of all mankind to achieve it.

Interstellar migration, astronomical scientists find planets suitable for human habitation in the universe or create conditions for human migration to other planets.

In the past, some researchers suggested that the number of early immigrants was several hundred, but scientists thought it necessary to discuss this issue again from the perspective of human population genetics. Too few people can't form a basic breeding group, and the number of immigrants also determines the size of the spacecraft needed.

According to foreign media reports, if human beings want to emigrate to other planets, they need a big spaceship. Cameron Smith, an anthropologist at Portland State University in Oregon, estimated that the original immigrant population was about 40,000. Such a large population can diversify the colonial population, which is statistically significant and can meet the needs of long-term space flight.

Interstellar migration will provide settlement space for billions of people born in the future. Marshall T. Savage predicted in the Millennium Plan that the asteroid belt could accommodate 7,500 trillion inhabitants. According to the current population growth rate, the earth's population density will reach saturation around 1440. However, interstellar migration also faces many problems. For example, our body structure is not suitable for staying in space for a long time. If we stay on the surface of Venus, we will be melted; if we stay on the surface of Mars, we will be frozen. The only way is evolution.

In the research report published in April this year, anthropologist Smith believed that the estimated time of interstellar travel reached 150 years, which was basically consistent with the Icarus plan proposed by non-profit organizations to go to the nearest star in the solar system. According to Smith's calculation, the initial number of immigrants must reach at least 6.5438+0.4 million, and the number ranges from 6.5438+0.4 million to 44,000. This is a simulation result based on the theory of human population genetics, of which 23,000 are men and women of childbearing age.

Smith admits that this number seems huge, but we need to maintain a certain number, because a large number of groups can avoid inbreeding and solve the problem that early immigrants feel depressed in the group. In fact, according to Smith's survey, the number of vertebrates should be at least 5,000 to 7,000 individuals. If they want to survive, they must maintain this basic population to avoid extinction. Even if we have thousands of immigrants, we still need to freeze sperm and eggs to maintain the superiority of the group.