The discovery of liquid water made Tang Feng extremely happy. But the next survey made Tang Feng's heart sink slightly.

Because when Tang Feng's gaze fell on the Martian core of Mars, the thing he had been worried about was finally confirmed.

The main reason why Mars is not suitable for human immigration is not because of the lack of gravity due to the small mass of Mars, which is almost blind to the poor conditions of the Martian atmosphere.

Mars is known to have a very thin atmosphere, which results in a very low atmospheric pressure on Mars. Under this atmospheric pressure, if the earthlings leave the life support system, it is impossible to be directly exposed to the surface of Mars, otherwise they will definitely die.

Another key reason is also the Martian atmosphere. Because of the thinness of the Martian atmosphere and the lack of protection from the Martian magnetic field, the solar wind can attack the surface of Mars unscrupulously. Compared with the low atmospheric pressure of Mars, the various rays contained in the solar wind are also extremely lethal to life on Earth.

It can be said that the low atmospheric pressure and various rays from the sun are the main reasons why Mars is not suitable for earthlings.

As for things like Mars' gravitational attraction is small, Mars' atmosphere is low in oxygen, and Mars' temperature is too low, this is not a problem. In order to completely turn Mars into a planet suitable for the survival of earthlings, the fundamental transformation lies in the Martian atmosphere and Martian magnetic field.

And these two things can be attributed to one point, that is, the modification of the Martian core.

Mars is too small to increase the mass of Mars out of nothing, even with the ability of the core. Of course, Tang Feng can use the star core to control several asteroids with enough mass, and then let the asteroids hit Mars, thereby increasing the mass of Mars. But this method is definitely a suicidal method, unless Tang Feng is brain-dead, he will never use this method.

Therefore, it is almost impossible to increase the density of the Martian atmosphere by increasing the mass of Mars. So there is only one way left, and that is to find a way to increase the thickness of the Martian atmosphere.

In order to increase the thickness of the Martian atmosphere, it is first necessary to ensure that the current Martian atmosphere is no longer stripped by the solar wind. But the problem arises again, because Mars has no magnetic field, or it disappeared in ancient times, resulting in the Martian atmosphere has been stripped by the solar wind for billions of years.

Because of the loss of the protection of the Martian magnetic field, the Martian atmosphere will be stripped by the solar wind by 100 grams per second! After more than 3 billion years, you can imagine how much the Martian atmosphere has been stripped away by the solar wind!

Therefore, in order to increase the thickness of the Martian atmosphere, it is necessary to restore the magnetic field that has disappeared from Mars!

Therefore, if you want to increase the pressure of the Martian atmosphere, you must increase the thickness of the Martian atmosphere, and you must restore the magnetic field that has disappeared on Mars!

At the end of the day, if you want to transform Mars into a habitable planet for earthlings, you must reactivate the cooled core of Mars!

That's right, the main reason why Mars is facing this situation is because the Martian core has cooled, resulting in the inability of the thermal fluid inside Mars to flow and exchange, so that the "generator effect" completely disappears, which leads to the disappearance of the Martian magnetic field, and then triggers a series of irreversible phenomena.

In fact, more than four billion years ago, Mars, like the Earth, had an extremely powerful magnetic field. This magnetic field, driven by the powerful Martian core, protects Mars from the solar wind all the time. Under the protection of the Martian atmosphere, a large amount of liquid water even appeared on the surface of Mars at one time, forming a spectacular Martian ocean.

If this situation continues, perhaps Mars, like the Earth, will develop and evolve over billions of years, and eventually form a planet with intelligent beings like the Earth.

But all this is because dozens of asteroids continue to hit Mars at a frequency of more than 20 million years, and the huge impact force generated by it has caused the Martian core, which was originally full of surging power, to be hit hard, so that the Martian core gradually fell silent and fell into an infinite sleep.

Rocky planets like Earth, Mars, and Venus all obtain their magnetic fields through the movement of molten iron in their cores. The vapor of molten iron in the Earth's core rises, then cools and sinks, creating a cycle that can generate a powerful electric current. At the same time, it is accompanied by the rotation of the planet, so that a sufficiently strong planetary magnetic field is formed. This effect is also known as the "generator effect".

Originally, the generator effect on Mars was great, but 4.5 billion years ago, an asteroid about the size of Texas hit Mars. The impact, known as Borealis, was the largest planetary impact in the solar system, flattening the entire northern hemisphere of Mars.

This violent impact caused the decline of the Martian generator effect. Of course, this impact alone will not make the core of Mars completely silent. But it can't stand the fact that since the "Borealis" impact, in the following hundreds of millions of years, almost every 20 million years on average, Mars will suffer a large-scale impact, the five most violent of which have formed five huge craters on the surface of Mars.

These continuous impacts made the Martian core of Mars unable to withstand it anymore, and in the end, the Martian core struck and went down!

As the core of Mars cools, it means the disappearance of the Martian magnetic field. Without the protection of a strong magnetic field, the Martian atmosphere is the first to suffer.

Originally, the solar wind, which was protected by the Martian magnetic field, had no rut at all in the Martian atmosphere, but now it finally has a place to use. The Martian atmosphere, deprived of the protection of Mars, is like a newborn lamb that has fallen into a wolf pack in the face of a strong solar wind

Over billions of years, the originally thick Martian atmosphere has been stripped into the current "thin as cicada wings, like dry bones", which not only reduces the thickness of the Martian atmosphere by nearly half, but also makes the density of the Martian atmosphere drop sharply, and makes the carbon dioxide in the Martian atmosphere no longer have the effect of greenhouse gases, which eventually leads to a sharp drop in the surface temperature of Mars.

Any irreversible phenomenon that occurs on Mars, if it happens on Earth, is enough to cause the extinction of all life on Earth. And the unfortunate Mars, under this series of blows, finally formed this withered "death star" with no signs of life.

Therefore, if you want to transform Mars into a planet suitable for human survival, it is fundamentally necessary to let the silent Martian core be "reborn" again, and then supplemented by other means to completely change the status quo of the Martian atmosphere.

And this set of processes, for the star core, is the best (to be continued.) )