The earth is a living planet, and the birth of life on earth is closely related to water. According to scientists’ research, the earliest life on earth may have originated from the ocean. Now all living things on land are made of water. Marine life continues to evolve.
Human beings were born millions of years ago, and the birth of human beings also upgraded the living planet of the earth to a civilized planet. The birth of human beings is actually inseparable from water. Without water, there would be no human beings. The birth of. It can be said that life on earth is basically inseparable from water, and water is the source of life on earth.
Therefore, when humans walked out of the earth with the rapid development of science and technology, they naturally began a journey of life exploration. In search of the existence of extraterrestrial life, scientists focused on the possible existence of liquid water. planet. Unfortunately, except for the earth, there is no liquid water on the surface of the eight major planets in the solar system. Although there is water on some planets, it exists in the form of ice.
The planet that scientists pay the most attention to is naturally Mars. Why do humans pay so much attention to Mars? The reason is that Mars is a neighbor of the Earth and a planet in the habitable zone. There are only three planets in the habitable zone of the solar system, namely Venus, Earth and Mars. Venus is a particularly harsh planet, with a surface temperature of over 400 degrees. It is impossible for water to exist, let alone for life to exist.
Due to the harsh environment of Venus, it is difficult for human detectors to land and detect. In the end, only Mars is left. Although its surface is also very desolate, the environment of Mars is relatively not particularly bad. At least the probe can land on the surface of Mars to conduct a series of detections. Scientists also hope to make major discoveries on Mars and even find the existence of Martian life.
As humans continue to explore Mars, we know more and more about Mars. Although Mars is now a desolate planet without life, the probe has discovered on Mars There are traces of the existence of rivers, lakes and oceans. Therefore, scientists judge that Mars has not been exactly like it is now since its birth. It may have been a beautiful green planet like the Earth a long time ago.
Then what is the reason that caused Mars to become what it is now? Through research and analysis, scientists speculate that it may be related to the disappearance of Mars' magnetic field. So does this magnetic field have such a big effect? Its effect is great. If a planet wants to have an ecological environment capable of supporting life, it must have a thick atmosphere.
But the universe is indeed an environment full of all kinds of strong radiation. For the earth, it not only has to face the constant intrusion of solar wind, but also faces various other cosmic radiations. If these radiations are not thick, Blocked by a thick atmosphere, it will directly illuminate the surface of the earth, which will not only abduct liquid water, but also cause huge damage to the ecological environment and deprive the planet of the conditions for the birth of life.
The earth has a strong magnetic field, and its coverage extends to thousands of kilometers of the earth’s orbit. The strong magnetic field protects the earth’s thick atmosphere, so that solar wind and cosmic radiation have no chance to abduct the atmosphere. . At the same time, the magnetic field can also effectively protect the liquid water resources on the earth, giving the earth a stable ecological environment, which is conducive to the birth and continuation of life.
The reason why the earth has such a strong magnetic field is related to the structure of the center of the earth. There is a core made of iron at the center of the earth. This core is not liquid, but exists in a solid state. Many people may think that the temperature in the center of the earth must be very high. Hasn't iron been melted into molten iron long ago? Not so.
There is an unimaginably huge pressure around the iron core. This pressure prevents the iron core from turning into a liquid, and there is an environment composed of various other metal substances on the periphery of the iron core. It can be said that the motion changes at the Earth's core are very complex. The general situation is that this motion is caused by the obvious temperature difference between the hot solid core and the cooler Earth's mantle. In the molten outer core, strong currents appear, and a magnetic field is formed. Due to the Earth's rotation, most magnetic fields cover our entire planet in a predictable and unidirectional manner.
The fact that rocky planets have iron cores is not unique to the Earth. Mars also has an iron core. In the early days of the solar system, the Earth and its neighbor Mars were formed at about the same time, and they both had their own Iron core, therefore, Mars also had a strong magnetic field that was not weaker than the Earth a long time ago.
The existence of the Martian magnetic field naturally gives Mars a thick atmosphere. Under the protection of the magnetic field and atmosphere, the surface of Mars is also a vibrant scene, with liquid oceans and possibly Martian life. Some scientists believe that life on Mars and life on Earth were born at about the same time, and developed similarly.
Then why has the earth developed until now and still has humans, while Mars has become a desolate planet? The disappearance of liquid water and atmosphere on the surface of Mars is related to the magnetic field. So how did the Martian magnetic field disappear? Based on some detections of the geology of Mars, scientists have put forward a conjecture: about 500 million years ago, an asteroid hit Mars.
The huge impact energy directly destroyed the motion environment at the core of Mars, causing the atomic nuclei to stop working, resulting in the existence of the Martian magnetic field. The core of the Earth is also in a state of motion, and it is this motion that gives the Earth a strong magnetic field. Under normal circumstances, this movement will never stop unless it encounters huge external force damage.
Mars may have suffered an asteroid impact that disrupted the convection process of the atomic nucleus, eventually causing the magnetic field to stop working. If this is the case, then the asteroid that hit Mars 500 million years ago was not small, and there are indeed huge craters on the surface of Mars. Therefore, there is certain scientific evidence for the asteroid impact theory.
After the magnetic field of Mars disappears, nothing can protect the atmosphere of Mars. At this time, the solar wind begins to invade, constantly destroying the atmosphere, making the atmosphere of Mars become thinner and thinner. Without the protection of the thick atmosphere, Mars will Naturally, the liquid water on the surface could not be preserved, and eventually it slowly disappeared, leaving it now desolate.
Although there is no liquid water on the surface of Mars, the probe has discovered ice caps in some places on the surface of Mars. Last year, scientists discovered a huge frozen lake under the surface of Mars. This discovery has scientists excited. This shows that not all the water on Mars may have disappeared, and some may still remain underground.
The discovery of the existence of water on Mars is of great significance for human beings to transform and immigrate to Mars in the future. Human beings cannot survive without water. If there is not a drop of water on Mars, then human beings' plan to immigrate to Mars may not be implemented smoothly.