Can today's desolate Mars be regarded as another dead Earth?

5 billion years ago, there was a large mass of nebula matter that slowly condensed together and revolved around the center. Most of this mass of token matter was hydrogen, and there were also some heavy elements.

After a long time of evolution, 99% of the nebula matter was condensed together and became the current sun, while the rest of the nebula that were farther away were not absorbed into the sun, but slowly condensed, and the nebula matter It becomes cosmic dust, and then from cosmic dust into small meteorites, these small meteorites collide with each other and become asteroids, and asteroids collide with each other, which has become the pattern of today's solar system.

This process lasted for 500 million years, and 4.5 billion years ago, the primitive earth was formed. If this is the case, then it is very likely that there will be no human beings today. The big catastrophe in the rebirth of the disk is to collide with a planet "Theia", which is slightly smaller than the original earth, and then fuse together.

This catastrophe had two consequences:

1. Let the size of the earth become what it is today

2. The debris that was knocked out became a satellite on the periphery of the earth - the moon

It is also this collision that created favorable conditions for the future earth, and finally gave birth to life on earth and evolved earth civilization. As for the group of planets 5 billion years ago, according to scientific speculation, it was formed after the explosion of the last star larger than the sun, which means that the current solar system developed on the basis of the last star that exploded. of.

At the same time, on the Fourth Ring Road next to the earth, a planet was also born, and this planet is now Mars. Since many comets participated in the process of forming Earth and Mars, a large amount of water is stored in the interior of Earth and Mars (this is the source of Earth's water: endogenous theory).

At this time, although the pattern of the solar system was formed, there were still asteroids formed by nebula material, which were not merged with the major planets, and were floating around the periphery. In 4.5 billion to 4 billion years, they continued to impact these major planets. Planets, as can be seen in the craters left by the moon and Mars today.

And due to the movement of the earth's inner crust, some early craters have gradually disappeared in the movement.

The distribution of water flow on Mars

Due to the continuous impact, the volcanic eruption was active, which also led to the water resources sealed in the earth and Mars. With the eruption of the volcano, the water vapor was erupted, and the water vapor turned into rain after encountering the cold air above. landed on the surface.

At this time, the earth and Mars are still in an active period, with an atmosphere, and a magnetic field is formed due to the active inner core, and it is also rich in water resources. Everything is beautiful.

On March 1, 2017, the journal "Nature" reported that the earliest microbial fossils were found on the earth, and it was inferred that it was about 4.2 billion to 3.8 billion years ago, that is to say, 4 billion years ago, the earth may have been born. Life, and now on Mars, which is similar to Earth, there is reason to believe that life was born on it.

This Chinese scientist Lin Yangting found kerogen from an ancient Martian meteorite, which can confirm this (interested friends can watch one of my previous articles, which has a detailed introduction)

But since then, the fates of Earth and Mars have diverged.

Although the earth has undergone several environmental changes, leading to 5 mass extinctions, it eventually recovered by its own self-healing ability. Instead, each mass extinction led to further evolution of creatures, until the evolution of human civilization.

But Mars has embarked on another road of no return. In 3.9 billion years, an asteroid of about a few hundred kilometers to 1,000 kilometers hit the surface of Mars. The impact site was in the Helas Basin of Mars. The impact was so powerful that it shattered the Martian core and stopped its activity.

After being devastated, Mars became a dead planet. As the inner core ceased activity, its magnetic field eventually disappeared, and then a large amount of Mars' water was evaporated and the atmosphere was lost, leaving only heavier gases such as carbon dioxide. (There is another saying that due to the small mass of Mars and less radioactive materials, the core of Mars will eventually cool down by itself).

The blue area is the Hellas Basin

Then it turned into a desolate look like it is now. Maybe seeing the photos sent by the Mars rover, I feel that it is similar to the desert area next door to the earth, but the fact is that even in the desert area of ​​the earth, the environment is tens of thousands better than the environment of Mars. times.

become a planet like Mars

Seeing Mars today, the earth tomorrow, after losing its magnetic field protection, or after the earth's environment has changed drastically and lost water and most of the lighter gases, the earth will also follow the footsteps of Mars.