13.8 billion years ago, a mysterious singularity beyond our imagination had a big bang, and the universe was born. The post-universe universe continues to expand rapidly, and the entire space rapidly extends to the surroundings. At the same time, various materials, celestial bodies, and galaxies are also beginning to form.
The solar system we live in was born 5 billion years ago. At that time, the current position of the solar system was just a nebula. As the nebula continued to rotate rapidly, a large amount of dust and matter began to gather toward the center, so the center of the nebula continued to condense to form later stars. sun.
After the sun formed, the leftover leftovers formed the eight planets and various other asteroids. Our earth is one of the eight planets in the solar system. It was born 4.6 billion years ago. The newly formed earth is not beautiful at all. There are rock awards flowing everywhere, which can be called a purgatory planet.
As time goes by, the earth slowly cools down before it gradually stabilizes. At this time, the earth forms a thick atmosphere with a large amount of liquid water on the surface. So early simple primitive life began to be born in the ocean, this time is about 3.8 billion years ago.
The core of life growth is evolution and evolution. Simple life can grow into complex life through evolution and evolution, and complex life can grow into intelligent life through evolution and evolution. Human beings were born 5 million years ago. Before the birth of mankind, there was an equally glorious era on the earth, that is, the age of dinosaurs.
Dinosaurs lived 65 million years ago and dominated the earth for 160 million years. At that time, there were a large number of dinosaurs all over the world, but later an asteroid impact exterminated the dinosaurs. So what was the earth before the dinosaurs? Someone once asked the question: 400 million years ago, when dinosaurs and humans were not born, what was the earth like at that time?
Some people may think that the earth 400 million years ago was certainly not as beautiful as it is now. Is this really the case? If you think so, you are wrong. Although no dinosaurs were born 400 million years ago, there were already very rich species at that time, and of course no mammals were born at that time.
The earth 400 million years ago was very beautiful. In the words of scientists, it was a paradise in our dreams. In the eyes of many people, heaven is a fantasy and beautiful world, and the beauty of the earth 400 million years ago can be compared to heaven. So how beautiful is it? You know, 400 million years ago, there was no pollution on the earth. At that time, the sky was very, very blue. At night, the stars in the sky were very bright, and the moon was much larger than it is now.
Therefore, the night 400 million years ago was much brighter than it is now, and the surface structure of the earth at that time is also very different from now. If you stand in space and look at it, you will find that there was only one supercontinent on the earth at that time. The continent is surrounded by a vast ocean.
I believe many of my friends know that the six major plates of our current earth were actually split by a supercontinent. Therefore, the early Earth did not have six major plates, only one plate, which we call Pangu continent. The time when Pangea began to split into the six major plates was about 234 million years ago.
Therefore, when the earth 400 million years ago was still a supercontinent, we can imagine how big a land was when the six major plates were merged into one. Beyond the land is the vast ocean, and since the original life on the earth was born in the ocean, the biological world 400 million years ago was mainly dominated by marine life, and terrestrial life may be very rare at that time.
In addition to the abundance of the creatures 400 million years ago, there is another obvious feature in common, that is, large, whether it is a plant or an animal, it is extremely large. For example, mushrooms and other plants can grow to a height of 7 meters, and marine creatures are also giants, many of which exceed 100 meters in length. One reason for this is that the mainland has not yet been separated, and food and resources are very abundant.
Another important reason is that the earth’s oxygen content was very high at that time, and high oxygen content easily created relatively large organisms. Because the oxygen content is very high, plants have sufficient nutrients to absorb. A small mushroom can grow to 7 meters. We can imagine how tall other plants, especially trees, are.
Therefore, the land of the earth 400 million years ago was a world of plants, which can be said to be a beautiful tropical rain forest. I believe that many friends have seen the movie “Avatar”. The beautiful virgin forest on the planet Pandora in the movie is equivalent to the earth’s continent 400 million years ago. We all admire the beautiful ecological forest scene on Pandora, but the earth 400 million years ago also had that beautiful ecological environment.
The beautiful virgin forests of Pandora gave birth to many extremely large creatures. In fact, the creatures on Earth 400 million years ago were much larger than those on Pandora. That was an era where greatness is beautiful. It is precisely because of the beautiful ecological environment in a high-oxygen environment that the era of insects dominating the earth later appeared on the Pangu continent.
I believe that many people have heard of the giant insect era, which is also not weaker than the dinosaur era. It was about 250 million years ago. The high oxygen environment made the first insects very large. The wingspan of ordinary dragonflies can be very large. Up to 2 meters, the centipede can grow up to 3 meters in length. There are very large insects everywhere, and the reproduction ability of insects is particularly strong, so there is a scene of insects dominating the world.
Later, Pangea began to split, volcanoes erupted, and the earth fell into a great ecological change, so the mass extinction began. In this mass extinction, most of the creatures were eliminated, but the dinosaurs took advantage of the trend, from only 5% of the biological world before the extinction to 95% after the extinction, the entire earth has completely become the home of dinosaurs, so it is a glorious period. The age of dinosaurs has begun.
Someone once asked the question: If the dinosaurs were not extinct by an asteroid strike 65 million years ago, would humans be born? In fact, many people think about this question. Do you think human beings will be born? Human beings are mammals. If human beings want to be born, first of all the hegemony of the earth must fall on mammals.
If there is no asteroid impact, dinosaurs will not be extinct. At that time, in the era when dinosaurs dominated, it was impossible for mammals to rise. Still only hiding in the dark to develop slowly, and the evolutionary evolution of dinosaurs will be faster. The final result of human beings will be two, one will never be born, and finally a branch of dinosaurs will evolve into intelligent life, the hegemony of the earth. Will fall on the dinosaur man.
Another result is that dinosaurs will never give birth to wisdom, and humans will still appear, but they will appear very late. It is possible that humans are still in a very primitive stone age. This shows how fortunate the birth of mankind is. Although asteroids will bring devastating disasters to the earth, we would like to thank the asteroid 65 million years ago. Without it, mankind would not be today. .