The earth is a beautiful planet of life, and in the long billions of years of life, countless creatures have appeared on the earth. Among them, what impressed us most was the dinosaurs 65 million years ago. The reason why we have a deep impression of dinosaurs is that apart from discovering a large number of dinosaur fossils around the world, another important reason is that the birth of humans is closely related to dinosaurs. Relationship.
Some people may say, how can the birth of human beings have anything to do with dinosaurs? In fact, the relationship behind it has gone. We all know that humans are mammals. Without the rise of mammals to dominate the earth, humans would not have been born millions of years ago. Mammals emerged after the extinction of dinosaurs. The reason is not to say that there were no mammals in the dinosaur era. In fact, the birth time of mammals may be about the same as that of dinosaurs.
However, because the age of dinosaurs was the era when dinosaurs dominated the earth. At that time, although mammals had been born, they could not compete with dinosaurs for the hegemony of the earth, so they could only develop wretchedly and move out at night. Mammals suppressed by dinosaurs have no hope of rising. It was not until dinosaurs were extinct by asteroids in 65 million years that mammals had a chance to step onto the stage of history.
From this point of view, the extinction of dinosaurs is absolutely essential to the birth of mankind. But dinosaurs have dominated the earth for a long time for 160 million years, so how did dinosaurs rise? The rise of any kind of living thing to dominate the earth cannot be occasional, and there must be deeper reasons behind it. The main reason is that the ecological environment has undergone tremendous changes. The rise of mammals is due to the great changes in the ecological environment and the extinction of dinosaurs, so the rise of dinosaurs is naturally inseparable from the great changes in ecology. What kind of great ecological changes led to the rise of dinosaurs?
At this time, scientists thought of the Carnian flood event 234 million years ago. 250 million years ago, the Triassic Period had just begun. At this time, the earth had just joined together. We call it the age of the Pangu continent. At this time, terrestrial organisms could live well for a long time, but what I did not expect is that 234 million years ago, things suddenly changed drastically, and there was a heavy rain on the earth.
Originally, the earth has a perfect ecological environment, and it is normal to rain, but what I didn’t expect is that the rain lasted for 1 million years. For the history of the earth, 1 million years is only a short period of time, but for the ecology of the earth, a million years of rainfall is definitely a catastrophe.
So how did this rain that lasted millions of years happened? Through extensive geological exploration and research, scientists believe that a volcanic eruption occurred in a place called Langoria near Alaska in the United States and British Columbia, Canada, 235 million years ago. The eruption is known as Langoria volcano in history.
This volcanic eruption in Langria probably lasted for hundreds of thousands of years, releasing large amounts of carbon dioxide into the atmosphere. By analyzing the oxygen isotope of fossil teeth, scientists found that the global temperature rose by 4-7 degrees Celsius at that time. The high temperature causes more surface water to evaporate, and accelerates the circulation of atmospheric water, making rainy weather more frequent.
If this is the case, volcanic eruptions will not cause continuous rainfall, so why can a 234 million-year-old super volcanic eruption bring about 1 million years of rainfall? The root cause was that the coal layer in the underground layer was destroyed by lava at that time, and a large amount of coal was ignited, triggering a series of chain reactions. This is very good evidence that scientists discovered that there was very little coal remaining in the Triassic.
Once the coal layer is ignited in a large amount, the global impact will be completely different. The most obvious effect is the continuous increase in temperature. According to estimates, the seawater temperature at that time was at least about 40 degrees. Such a high temperature caused a large amount of seawater to evaporate. The water vapor floats in the atmosphere. Such a high temperature climate may last for 10 million years.
This great ecological change also brought a terrible mass extinction event to the earth. Although most of the creatures became extinct because of this, a whole new kind of creature-the dinosaur was achieved. In the rocks at the beginning of the Carnian flood event, dinosaur fossils accounted for 5% of all terrestrial vertebrates, but when the rain was almost over, their proportion soared to 90%.
Before this rain for millions of years, the ancestors of the dinosaurs were curled up at the southernmost tip of Pangu continent. But after the rain of indiscriminate magic attacks, they swept the screen and occupied the world, becoming the new overlord of the earth.
Through a large number of geological observations and studies, scientists have learned about the Carnian proliferation event that occurred 234 million years ago and the reason for the rise of dinosaurs. But at this time, scientists are full of worries about the future of mankind. Why?
Through the previous understanding, we know that this rain, which lasted for millions of years, was caused by a volcanic eruption, but the direct cause was the terrible greenhouse effect brought about by the large amount of carbon dioxide emitted at that time. It is the greenhouse effect that causes the earth’s temperature to rise to a certain value before it triggers terrible rainfall.
After mankind entered the era of science and technology, the development of a large number of industries has also continued to emit carbon dioxide into the atmosphere, and the resulting greenhouse effect has also caused the earth’s temperature to continue to rise. In the past, we thought that rising temperatures would melt ice and snow in the Arctic and Antarctic, and at most would increase the sea level. There would be no more serious ecological disasters.
However, the Carnian flood events have made us realize that once the earth’s greenhouse effect is so serious that the ocean temperature can reach the temperature value of the Carnian flood events, perhaps a new round of millions of years of rainfall may occur. At that time, it will bring devastating terrible disasters to the earth’s ecology, especially the survival of mankind.
To prevent such things from happening, we can only work hard to protect the environment and slow down industrial carbon dioxide emissions. Only by keeping the earth’s environmental temperature within a safe range, will it not eventually lead to an ecological collapse and an irreparable and terrible ecological disaster. To do this requires the joint efforts of every child of the earth.
The earth is the earth of all mankind. Only when everyone has the awareness of environmental protection and the obligation and responsibility to protect the earth can the greenhouse effect of the earth be truly controlled at that time. If we do not control it, it is possible that in hundreds of years, the ecology of the earth will truly collapse as Hawking predicted, and humans will also lose the beautiful home of the earth at that time.