astronomer
Albert einstein
Earth is a rocky planet, standing in space we will see a beautiful blue sphere, which is the home of human beings for millions of years. Before entering the era of science and technology, the ancients did not know what kind of world the earth was, and where humans lived in this world.
It is not until human beings embark on the road of scientific development that we gradually understand that human beings have not really mastered the earth, and the place where we live is only the surface of the earth, and there are two places on the earth that are still out of human control, one is the ocean world and the other is the underground world.
For the ocean, we believe that everyone knows that 71% of the surface of the earth is composed of oceans, and human understanding of the ocean is actually very small, only about 10%, and what kind of secrets are hidden in the deep sea, we do not know at present. The secrets of the Earth's interior are more attractive to us than the oceans.
As we all know, according to modern scientific research, the earth is mainly divided into three parts: the crust, the mantle and the core. The crust is the outermost region of the earth, the average thickness is about 17 kilometers, human beings live in the outermost layer of the earth's crust, although humans went out of the earth 50 years ago to explore the universe, but we still know very little about the interior of the earth, and the legend of the underground world has been from ancient times to the present, but we have not yet solved this mystery.
What exactly is inside the earth, and whether there is a mysterious underground world, we do not know at present. The only human knowledge of the Earth's interior is limited to the crust, mantle and core, and the crust is 17 kilometers thick, and in such a thick area, whether there is a huge underground hollow world is still unknown.
Our understanding of the mantle is that it is a liquid world of magma flowing, but the truth of the matter needs to be further explored. There are legends about the existence of the underground world from ancient times to the present, and there are many theories about the connection between the surface and the underground world.
In the journal Scientific Reports, there was an article in which scientists found a huge "river" beneath the surface of Australia, a hidden undersea river that only appears in autumn and winter. The entire river spans 10,000 kilometers, there are many special additions, and the discovery of this river has also caused a sensation in the scientific community.
Some scientists have speculated that the river may be a passageway to the new underground world. Scientists have spent more than 2500 days and nights exploring this river, and there is not much known about this mysterious river at present, only that its water density is "stepped", some areas are dense, some areas are very dense, and it only appears in autumn and winter.
Why does the river only appear in autumn and winter? Scientists believe that it may be related to temperature changes in Australia. It is the gay river that changes with seasonal changes, so scientists suspect that it is equivalent to a passage in itself, connecting to the depths of the earth, as to where it leads, it is not yet known, and further exploration is needed.
The ocean is the closest area to the mantle, and scientists have found that the seawater on the earth's surface has been flowing into the earth's interior for a long time, and about hundreds of millions of tons of water flow into the earth's crust deep into the mantle layer through the gaps at the bottom of the ocean every year.
The existence of water in the earth's interior is already a fact that there is no doubt, but the form of water in the earth's interior needs to be further explored. Some scientists believe that the water in the earth's interior is dissolved in magma, forming a water cycle with the surface, and some scientists believe that there may be a huge mysterious space in the earth's interior, and the water flowing from the surface will converge in this space to form an underground ocean.
For the study and exploration of the mantle layer, scientists have also made new progress in recent years, according to the American Geophysical Union report, scientists found a giant mountain in the earth's interior, through 3D images to map out the situation of the mountain, scientists found that the entire mountain is 100 times higher than Mount Everest.
The location of this underground giant mountain is located in the mantle layer, to know that the mantle layer is a world of high temperature and high pressure, in theory, there should only be flowing magma here, how can there be a mountain peak? However, through the exploration of seismic waves, it is indeed found that such a huge mountain peak exists in the mantle layer, but there is no answer to how it is formed.
The discovery of the giant peaks in the earth's interior has once again made people full of expectations for the existence of the underground world. Scientists believe that this mountain in the earth's interior may be the biggest secret of the earth, it may be one of the main factors in the formation of plate tectonics, and it may also have a certain relationship with the formation of the earth's surface ecosystem and the formation of life.
Combining these circumstances, many people feel that the earth is not as simple as we think, the surface of the earth is a rich life world, the ocean has a rich marine life world, it is possible that there is also an underground life world inside the earth that we do not understand at all.
Although we do not know whether there is a huge space in the interior of the earth, the existence of a living world underground has indeed been affirmed by scientists. In the past 10 years, scientists have discovered a large number of various life in the underground through a large number of research and exploration, and the richness of underground life is far more than our estimate, and it can even be said that in terms of quantity alone, the life underground can be called the hegemon.
Moreover, scientists have also discovered various kinds of life under some extreme environmental conditions, and these lives are constantly pushing the limit beyond our past understanding of life. In 2020, scientists have also discovered animals that don't breathe, living organisms that can survive in a 100% pure hydrogen environment.
This important discovery makes us realize that human beings' understanding of life is still very "shallow", and that life's ability to adapt to the environment is beyond our imagination, and that life can survive in extreme environments that we think are impossible to exist. Such discoveries have important reference significance for our search for extraterrestrial life.
For the exploration of the underground world, human beings have just started, I believe that with the continuous progress of science and technology, the future with the support of more high-tech strength, we can really enter the underground world, explore the mysteries of the earth's interior, and thoroughly understand the earth. Perhaps in the future, when we really enter the underground world, there will be more unexpected and important discoveries.