After walking out of the earth, human beings began to explore and study the solar system. The most selected planet for exploration is the moon. In the last century, human beings also landed on the surface of the moon, realizing a big step towards space.
The moon has no atmosphere, it’s just a satellite, and there are not many secrets. For human beings, the planets that are more valuable for exploration, especially Venus and Mars, which are in the same habitable zone. Scientists pay more attention to these two planets and think that their value is very high, mainly because these two planets have many similarities with the earth, and they are also habitable planets.
Theoretically speaking, the planets in the habitable zone all have the possibility of becoming life planets, but what we know is that only the earth is a beautiful life planet among the three planets, Venus and Mars, one is a purgatory planet, and the other is a desert planet. They are all very bad planets without life.
The earth can become a beautiful ecological planet, and Venus and Mars should be able to, so many scientists speculate that Venus and Mars in ancient times may also be beautiful ecological planets, and even may have given birth to life. If so, what caused these two planets to become what they are now?
Scientists want to find out why their ecological environment has changed dramatically, so that they can make a reference for the earth, and avoid the same fate for the earth in the future. Moreover, the future of mankind is bound to be star oriented and open the way of interstellar colonization. Then the second and third homes of mankind may be these two planets, because they have the foundation to become ecological planets, but they need a lot of transformation.
After human walking out of the earth, the first planet to explore is Venus. However, due to the extremely harsh environment of Venus, the surface temperature is as high as 460 degrees Celsius, and there is a thick atmosphere and acid rain layer. Such a bad environment makes the probe unable to land, so scientists have to give up the exploration of Venus for the time being and focus on Mars.
The environment of Mars is much better than that of Venus. The thin atmosphere allows the rover to explore in Mars orbit, and the rover can also land on the surface of Mars for short-range mobile exploration. Through billions of years of continuous exploration, scientists have discovered many secrets on Mars, and they know more and more about Mars.
When the probe arrived on Mars, its first impression was desolation. The whole surface looked similar to the desert environment of the earth, with almost no trace of liquid water. So Mars really doesn’t have water? This is very important for human beings. Scientists expect Mars to become a second home for human beings.
If Mars doesn’t have liquid water, the dream of a new home might be shattered. Water is not only the source of life, but also necessary for human survival. Whether it is to transform the Martian environment or human survival on Mars, it needs the support of water resources. If Mars does not have water, it is difficult for us to transform Mars into a livable planet suitable for human survival.
So is there water on Mars? After continuous exploration by the probe, it is found that although there is almost no trace of liquid water on the surface of Mars, there are cold and hard ice sheets in the polar regions, and there is liquid water under these ice sheets. As early as 2018, European and American scientists discovered that there were liquid lakes on the ground or under the ice sheet in some parts of Mars through astronomical instruments.
Among them, three lakes are relatively large. The largest one has a diameter of 30 kilometers and an area of more than 600 square kilometers. The area of such a Martian lake is almost as large as that of Dongping Lake, which is a huge discovery. It can also be seen that although Mars is desolate, there are still many water resources.
Some people may have said that the temperature of Mars’ poles is 100 degrees below zero, does water energy remain liquid? At the beginning, scientists did not believe that there would be liquid water resources at the poles of Mars. It was too cold there, but the observation results of the probe did find liquid lakes. What’s the matter?
Being able to keep liquid in a low temperature environment indicates that the water quality of this kind of liquid water is very different from that of the earth. Scientists believe that the liquid water in Martian lakes should be brine with very high salinity. Only when the salt content is very high, can it keep liquid in a low temperature environment.
This kind of high salt brine can’t be used and drunk directly. If we want to use these liquid water on Mars, we need to refine them by heating and evaporation. We can refine the salt and get pure water for our use. In any case, to be able to find such a large area of liquid lakes at the poles of Mars is undoubtedly great good news for mankind.
So will there be life in the salt water? Theoretically, the possibility of life is very small, but we can’t completely rule it out. We should know that some anaerobic bacteria can survive in such an environment. This may be a good place for scientists to search for life on Mars. However, it is very difficult for human probes to land at the poles of Mars, and the current technology can not do so.
Therefore, the lakes at the poles of Mars can only be observed by orbiting probes, only a number of liquid lakes have been found here, and the specific situation is still unknown. It is not a definite answer that these liquid lakes are of high salt water quality. They exist under the ice sheet. Maybe there is another possibility.
If there is volcanic activity at the poles of Mars, the temperature of volcanic activity will melt the ice above and form liquid lakes under the ice sheet. If this is the case, then these liquid lakes are fresh water. Which is the truth? Scientists need more exploration and research. The best way is to go to the poles of Mars and collect water resources in lakes for analysis. Then we can get the answer.
Through more and more explorations on Mars, we find that Mars is not as simple as we thought in the past. It is possible that the first discovery of extraterrestrial life by human beings will be on Mars. And more and more evidence also shows that Mars is not as desolate as we think, and its hope of becoming the second home of mankind is greater and greater. Perhaps in the near future, some human beings will migrate to Mars and form a Martian civilization.