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Why can the lunar soil be brought back to the earth, but not Mars? Scientist: It’s about human survival!

With the continuous development of science and technology, human exploration has gradually become dissatisfied with the corner of the earth, and more people have turned their attention to the vast space of the universe. In fact, as early as decades ago, humans had the idea of ​​space migration, but today, because human conditions are not perfect in all aspects, we have so far except the United States after the manned moon landing in the 1960s, other countries There has never been a manned mission to the moon, let alone a spaceship to a farther planet. Why can the lunar soil be brought back to the earth, but not Mars? Scientist: It’s about human survival!

Mars is also 55 million kilometers away from the Earth, and it is actually a very difficult problem for a probe to travel such a long distance. This means that bringing some soil back from Mars is actually a very “not cost-effective” business, so no country will put great effort into researching a Mars rover that can return and bring soil back. Speaking of migrating planets, the current goal of human beings is Mars, because this planet is the most similar to the solar system and the earth, and it is more suitable for humans to live in regardless of the tilt angle or the length of rotation.

Why can the lunar soil be brought back to the earth, but not Mars
Source: Getty Images

Scientists said that the moon and Mars are not the same. The reason why the moon can get back the soil is that it was brought back to the earth through the probe after many inspections, studies, and tests. In addition, the moon is in a vacuum environment and it has been confirmed that there is no Life exists, and life cannot exist.

In comparison, the moon is only 384,000 kilometers away from the earth, which is only about one-137th of the distance from Mars to the earth. Therefore, it is much easier for the probe to travel between the moon and the earth. The more important reason why Martian soil is not brought back to Earth is the fact that Mars is “livable”. Because there is a lot of evidence that there are traces of liquid water on the surface of Mars and even in the soil, and the atmosphere also contains a lot of methane, this means that the possibility of life on Mars is very high. At that time, I am afraid that it will affect the ecological environment of the earth. We all know that the invasion of alien species is very serious and may cause huge harm to humans and other animals in minutes.

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Because Mars and the Earth have completely different natural environments, the life born from them is likely to contain some viruses, bacteria, and microorganisms that humans have never been in contact with. To know that they can survive such harsh conditions on Mars, their vitality must be very tenacious. If the soil containing these unknown viruses, bacteria and microorganisms is brought back to the earth rashly, it may also bring some unknown diseases. In general, there are many obstacles to human migration to Mars. But fortunately, due to the rapid development of science and technology, in the foreseeable future, mankind is likely to overcome these difficulties and officially embark on the journey of colonization in the universe.

What’s even more frightening is that the plots of some kind of cosmic bacteria in science fiction movies that exterminate the entire human race may really be staged in reality. Therefore, in order to eliminate this potential threat, the Martian soil will not be brought back to the earth. Not only the soil, but the current scientific community has a customary habit of not recycling any celestial detectors (except the moon). On the one hand, it is the control of technology and cost, and on the other hand, it is to prevent the threat of unknown life. Therefore, before scientists have the ability to guarantee that there is no life on Mars, Martian soil is absolutely impossible to bring back to the earth, unless we can be sure that there are no microorganisms in the soil.

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