Mars is the planet that people pay most attention to except the earth. Because of its many similarities with the earth, Mars is also known as the "twin brother" of the earth. Mars is also the preferred target of human interstellar migration and a planet with high hopes.

Mars is an earth like planet. Its volume is only half of that of the earth, and its mass is only one tenth of that of the earth. Compared with the earth, the environment of Mars is very harsh. Its surface is covered with sand dunes, and dust storms often occur. The temperature difference between day and night is large, and the atmosphere is thin and cold. Although the existence of liquid water on Mars was confirmed some time ago, if Mars is not transformed, it is not suitable for the survival and development of life on earth. So, if the positions of the earth and Mars are interchanged, what will the earth look like, and will there be life on Mars?

Let's talk about the changes of the earth first. If the positions of Mars and earth are interchanged, the earth may become a dead planet, because the distance between Mars and the sun is much farther than that between the earth and the sun, which means that the temperature of the earth will drop sharply after it comes to the orbit of Mars. Moreover, because the earth is rich in liquid water, low temperature is likely to turn the earth into a big ice ball, many lives on the earth will be wiped out.

If the positions of Mars and earth are interchanged, it is also difficult for Mars to produce life. First, the atmosphere of Mars is too thin to provide sufficient support for life, and after Mars comes to the orbit of the earth, its atmosphere will even disappear, because after Mars comes to the orbit closer to the sun, the solar wind it bears will become larger. At that time, the solar wind with a speed of 800 kilometers per second is likely to blow the thin atmosphere of Mars completely, and Mars without an atmosphere, it is almost impossible to have life.

The pressure of Mars is very low, only about one tenth of that of the earth, when Mars comes to earth orbit, the hot solar wind will evaporate all the liquid and solid water resources of Mars, making it a dry planet completely, and it is almost impossible to produce life.

The production of life is actually a small probability event, which requires many factors to work together. The earth's ability to produce life is both accidental and inevitable. We are not sure whether there are other planets in the universe that have given birth to life, so we should love our lovely earth.