The earth is the home where human beings have lived for millions of years. With the continuous development of human science and technology, we know more and more about this home. If you want to ask where the most mysterious place on earth is, some people may say it’s the ocean. In fact, the real mystery of the earth is the interior of the earth.
For the earth’s surface, we have more ways to observe, explore and study. Especially after human beings go out of the earth, they can observe the earth’s surface through satellites. It can be said that the secrets of the earth’s surface have been almost studied by human beings. The second is the ocean, which accounts for 71% of the world’s total area. With the development of science and technology, we can dive into the deep sea for exploration with increasingly powerful diving equipment.
Although we have not yet fully understood the situation of the ocean, we also have more knowledge about the ocean. But we know too little about the interior of the earth. The main reason is that we can’t explore the interior of the earth. The radius of the earth is about 6371 km, which can be divided into crustal layer, mantle layer and geocentric layer.
The outermost and thinnest of the earth’s three structures is the crust, which is about 17 kilometers thick. At present, the deepest underground borehole is 12263 meters, which is less than the thickness of the earth’s crust of 17000 meters. In other words, with the current technology of human beings, it is impossible to drill through the crust. Not to mention the 2865 km thick mantle layer and the thicker core layer.
Now that human science and technology can’t drill down to the ground for exploration, how can scientists get some data about the ground? In fact, it mainly depends on seismic waves. We all know that the earth is made up of various plates. When these plates move or rub, earthquakes will occur, and seismic waves can propagate inside the earth.
Because the propagation speed of seismic wave in the earth is different, scientists can simulate some structural characteristics of the earth’s interior by collecting the data of seismic wave. I believe many people know that beneath the crustal layer is the mantle layer, which is equivalent to a high-pressure and high-temperature iron pot with liquid boiling and boiling inside.
Many substances are boiled into paste (molten shape) or become liquid. Many people may think that the slow layer is molten substance, but in fact, there are still some solid substances here. According to scientists through the detection of seismic waves, in the Pacific Ocean and Africa, 2000 kilometers below the Atlantic Ocean, the growth of two huge foreign bodies.
According to the data of seismic wave detection, the two giant foreign bodies are 100 times higher than the world’s highest peak, Mount Everest. If they are placed on the ground, they can directly reach into space, and their area is the sum of the seven continents in the world. Is there such an incredible giant object inside the earth? What would they be?
Some people may wonder how scientists discovered such giant foreign bodies when the mantle layer was so deep from the ground? Scientists say all this is due to a new method of imaging the earth’s interior, namely seismic tomography. When seismic waves shake the earth, that is, the earthquake is releasing energy waves around. Scientists use thousands of seismographs around the world to track seismic waves in reverse and lock down the source of the earthquake.
Once the source of the earthquake is locked in, scientists can calculate the speed of the seismic wave propagating inside the earth. Generally speaking, the velocity of seismic wave will be different when the material structure of the earth is different. Researchers create images of the earth’s interior based on the speed of travel, and we can see things we’ve never seen before.
These two giant objects in the mantle layer were discovered by seismic tomography. The local seismic waves of these two giant objects will be much slower than usual, which indicates that there are very dense solid materials in these two places. Through the seismic wave data, the simulation imaging finally shows the outline of these two giant objects. They’re stuck in the mantle like two giant mountains.
What are these two giant underground objects? Now scientists have no definite answer, but they think that they may be the biggest secret of the mantle layer. If we can uncover their mysteries, we may be able to uncover many secrets inside the earth. Some scientists believe that the structure and movement of the earth’s plates may be closely related to these two giant objects, and even the birth of life on earth may also be related to them.
These two giant solid materials can exist in the cap layer, which indicates that the time of their formation is probably in the process of the formation of the early Earth. How they formed is still a mystery. Our understanding of them is still in the guessing stage, and seismic waves can only detect a very fuzzy data. To understand them, we need to go deep into the mantle.
Some people may think that human beings will never be able to go deep into the earth’s interior to explore. But in fact, this is not the case. The main reason why it is difficult for us to enter the earth’s interior is that we do not have stronger high temperature resistant materials. With the rapid development of science and technology, there will inevitably be stronger materials in the future. As long as the drill can withstand high enough temperature, penetrate the crust, and go deep into the mantle layer, it is not a problem. At that time, we can put a detector down through the borehole, and maybe we can detect these two giant objects in the mantle layer in a short distance.
With the development of science and technology, we can not only go deep into the mantle layer, but also the core layer. At that time, all the mysteries of the earth’s interior will be revealed. At that time, we can fully understand the situation of the earth’s interior and see what secrets there will be. Maybe it will be much richer than we think. There may also be major discoveries beyond human imagination. We are looking forward to this day.
Guys, what do you think these two incredible giant foreign bodies in the mantle will be? Welcome to leave a message below to discuss and express your opinions.