Why is only Mars suitable for human habitation?

1, Mars is not special among the eight planets in the solar system, but from the perspective of life reproduction, the advantage of Mars is that it has water. Because of the low temperature, all the water on Mars exists under the surface in the form of ice. If all the ice melts, water can cover the entire surface of Mars with a depth of 1 1 m. Life is inseparable from water, and Mars obviously has the most basic conditions to sustain life.

Man's exploration of Mars began as early as 50 years ago. At present, there are many experimental projects to observe and explore Mars. In this process, people's understanding of Mars is deepening.

Scientists speculate that Mars billions of years ago probably had a thick atmosphere, water, oceans and even life, just like the earth today. However, because the gravity of Mars is too small, atmospheric molecules keep fleeing, and Mars becomes as cold and dry as it is now, and ancient life disappears or hides underground.

In addition, it has been confirmed that there is a small amount of methane in the atmosphere of Mars, and its source is still a mystery. It may come from a chemical reaction, or it may be produced by bacteria-if the latter is strong evidence of life on Mars.

Reasons for not living on Mars:

Technically speaking, the biggest problem facing immigrants to Mars is not "traffic", but physical and psychological problems.

According to the existing space technology, it takes about 8 months to fly from Earth to Mars. The long journey will bring many problems to immigrants, such as muscle atrophy and osteoporosis caused by weightlessness, cancer caused by cosmic ray radiation, and mental illness caused by long-term living in a small space.

In addition, even if we successfully reach Mars, how to build a sustainable base is also a challenge. Due to the limited number of immigrants, most of the labor force relies on robots. Besides cultivating food and digging water sources, the most urgent problem is how to extract oxygen and ensure breathing.

Refer to the above content: People's Daily-People's Daily Science and Technology Grand View: Why do you want to immigrate to Mars?