Why did you immigrate to Mars and never return?

Long ago, humans immigrated to the earth on this uninhabitable planet. All human beings are immigrants. American scientists will send the first batch of citizens to the United States voluntarily in 2030, but after they go, they may not be able to return to Earth. Therefore, these voluntary citizens are prepared to be isolated from the world.

But Mars is not the earth, with low climate and insufficient oxygen, and the sky is red. Without sunshine, the whole Mars is full of smoke and toxic gases. Without protection in the living building, human beings will soon die. But since the United States has done it, it knows how to protect it, but Mars has no water and cannot grow food, so it can only be built and spent the rest of its life in it. So this Mars building is not only closed, but also has oxygen, water and energy.

However, being able to transport human beings to Mars this time will be the pioneering work of human beings coming to the earth for 10 thousand years. The scientific and technological ability of mankind before coming to the earth is likely to be higher than today. Therefore, the United States has taken a crucial step. Sending a man to Mars this time is actually a spaceship carrying experiment. But after this success, if American high technology finds a second earth or a better place than the earth outside the solar system in the future, then American scientists will send humans there.

This also means that the earth is becoming more and more dangerous, and the earth is slowly undergoing drastic natural changes. The stinking earth will not only abandon earthquakes, volcanic eruptions and floods, but also destroy mankind. What is even more frightening is that if small alien stars hit the earth before this, then human beings will be completely extinct. Therefore, the United States is ready to escape for the future extinction of human beings on earth. This means that the earth is really short of time.