It has been 4.6 billion years since the birth of the earth, but what has happened in these 4.6 billi

In 4.6 billion years, the earth first began to be an icy planet, first began to cool down, secondly, due to the asteroid hitting the earth, the earth appeared oceans and some microorganisms, and then, due to the life of microorganisms, the land slowly appeared, and finally the microorganisms gradually evolved into multicellular, and organisms slowly formed some complex animals and plants, until now it has become what we can see.

After the formation of the Earth from the nebula, there have been many mass reproduction and mass extinctions in the history of the Earth, and the Earth has also experienced many cold ice ages.

Life is evolving, multiple species are constantly being eliminated and replaced, the environment is changing periodically, and human beings are gradually standing at the top of the food chain.

What has the Earth experienced over billions of years? For us human beings, the earth is the home of survival, is a green ecological planet, in fact, when the earth was first born, the environment was also very harsh, compared with Venus, it is not much better. However, after about 2 billion years, the algae on the earth began to multiply rapidly, and the oxygen on the earth began to be produced in a large area, and the earth gradually became a planet with life.

Many people know the age of dinosaurs, when dinosaurs existed all over the world, but later because of the meteorite hitting the earth, the natural system was destroyed, and then the dinosaurs also disappeared in that era. According to scientists, the Earth we live on has been around for about 100 million years. In these 100 million years, the Earth has gone through many stories.

From the beginning of the ancient state, that is, the pre-Cambrian season, 10.7 million years ago, the creatures on the original art began to sprout, and after entering the tiger's birth and defeat, the Cambrian season began, and there was Cambrian during this period.

Biological explosion is a theory of various control animals, mollusks, etc. began to appear in the real sense, and the last Ordovician Stagnant Record, Devonian Ji made the whole earth have earth-shaking changes again. In this way, it came to the lifetime era, and during this time, the dinosaurs became the overlords of the entire era.

The climate of the three-D machine was dry, the evil dragon fish appeared, the dinosaurs exploded during the Jurassic period, the continental oceans separated during the Cretaceous period, and the dinosaurs became the hegemon. Then came the well-known clouds, which were the complete extinction of the dinosaurs on Earth.

It was only later that an anaerobic photoautotrophic archaea appeared on Earth, and they were the first organisms on Earth to use sunlight for energy. But this bacterium plays the role of a devourer, and they produce a kind of cyanobacteria, that is, after the appearance of cyanobacteria, the oxygen on the earth begins to be released on a large scale, and the earth completely changes. Later, human beings sprouted, starting from ancient plains to the top of the food chain, and then to human civilization began to inherit.

Now that technology is advanced, it has to be said that the earth on which you live can only witness the existence of generations of creatures.

After a lot, many disasters, the previous dinosaurs were extinct, humans were born, the evolution time was relatively long, and the biological environment has undergone particularly big changes.

In the past billions of years, the earth has experienced many extinctions, many destructions, meteorite impacts, cooling of the earth, a lot of development, and plate movements, and finally developed into this way.

The Earth has been through a lot in billions of years. In the past, we have experienced the Ice Age, experienced the extinction of organisms, and in modern times, we have experienced wars, and various countries have exploited the earth on a large scale, and the environment is seriously polluted, and the pressure on the earth is very great.

After being destroyed, reborn, and developed into what it is now, there are many civilizations on the earth, and we are now living on the earth.

Do you know how the Earth has changed in 4.6 billion years? First, let's go back 4.6 billion years ago, when the Earth was first born, and there was no life. The surface of the earth is hot up to 5,000 degrees, similar to the sun, and there is not a trace of life in it.

The debris left behind by the big ** has caused a large number of meteorites to constantly hit the Earth. 4.5 billion years ago, a planet named Theia crashed into the Earth, and the Earth almost fell apart, but it also has the Moon. The tidal forces of the Moon have caused the Earth's rotation to decrease year by year, and the liquid magma on the surface has begun to cool gradually.

4 billion years ago, a huge water comet hit the Earth, releasing ice and fire, and it rained on the Earth for 3 million years. Since then, the earth has also turned blue.

3.7 billion years ago, plants learned to photosynthesize and began to grow explosively. A large amount of oxygen is constantly produced and fed into the earth's air. A billion years ago, the Earth experienced a terrible Ice Age.

Tens of millions of years of ice caps have imbued the land with a northern flair. 500 million years ago, the earth ushered in a huge turning point, the Cambrian explosion of life finally arrived, countless wishes, animals and plants began to awaken. Thus, 200 million years ago, the first super-era dinosaur empire on the earth directly ruled the earth for hundreds of millions of years after that.

Until 65 million years ago, an asteroid with a diameter of 10 kilometers hit the Earth, and its great power** was equivalent to a 1 million tons of nuclear bombs. Since then, the dinosaur dynasty has become history, and mankind finally has a chance to appear. Two million years ago, the first Homo sapiens on Earth was born, and in the millions of years that followed, he was invincible, eventually terrifying countless creatures and creating today's human civilization.