In addition to prehistoric people and aliens, some people even thought of the possibility of the underwater people building the pyramids of Egypt. At present, there were still people who believed that humans originated from the sea. When humans evolved, it was very likely that some of them went ashore, while others remained in the water and developed a civilization that was more advanced than their counterparts on land.
However, due to the special environment of the ultra-high pressure at the bottom of the deep sea, even if there were undersea people who wanted to visit the surface of our Earth and set foot on the land of ancient Egypt, they must wear thick special clothing like spacesuits (just like the principle that humans living on the surface of the Earth could not see live hairtails). However, no such traces were found in all the records and artworks of ancient Egypt. By the same logic, it was said that naked underwater people were found on the surface of the sea, but it did not conform to the common sense of water pressure.
The reason why there were no high-level intelligent creatures at the bottom of the deep sea was also due to environmental factors.
As everyone knew, the characteristics of the deep sea were high pressure and low temperature. The difference between higher animals and lower animals was the evolution of some organs, as well as the perfection of organs. However, under high pressure and low temperature environments, the evolution of higher organs was not allowed. In addition, the law of nature was that the harsher the environmental conditions, the lower the level of the creature: Take humans as an example. They had to have a suitable temperature, pressure, oxygen content, and a series of other suitable conditions to survive. This was because the higher the level of an animal, the more complicated its structure, and the weaker its resistance to extreme environments.
There was more oxygen on land, so creatures could get more energy from the chemical reactions in their bodies, which could also accelerate evolution. On the other hand, the oxygen content at the bottom of the sea was extremely low, and high-level life forms would not be able to obtain sufficient energy supply and thus it would be difficult to survive. To give a more convincing example: Although aquatic mammals returned to life in the water, none of them really breathed in the water, and none of them had lungs that turned into gills, even though they could have a wider range of activities and a wider source of food.
Moreover, it was difficult to evolve complex creatures in the environment of the seabed that had not changed for many years (marine mammals returned to the ocean). The underwater biosphere was less affected and stable. At the same time, the competition wasn't as intense as on land, so evolution was slower. The food climate on land changed more than in the sea. In order to adapt to the various changes on land, creatures had to evolve in the direction of high intelligence. In addition, the movement of the earth's crust on land was more obvious, which could easily cause geographical isolation of creatures. Thus, there were more evolutionary directions and it was easier for them to develop towards higher levels.
In other words, if prehistoric people migrated to the bottom of the sea and lived in seclusion, it would only be easy for them to stop moving forward and fall behind our land civilization. The possibility of their civilization surpassing our land civilization is worth asking. Moreover, there was no need for the so-called prehistoric people to hide from the humans on land and hide at the bottom of the sea.
(3) If there had been a super-civilization under the sea, then a large number of mineral resources that existed under the sea should have been exploited by them long ago. It would not have been the turn of humans on land to mine them. To sum it up in an idiom, it was "the closest tower gets the moon first." This was similar to the reason for rejecting the prehistoric super civilization.
It was not an exaggeration to say that the ocean had almost all kinds of resources that could be found on land, and there were also some resources that could not be found on land. At present, people had discovered the following six categories:
1. Oil and natural gas. It was estimated that the world's seabed oil reserves were 135 billion tons. The world's marine natural gas reserves are 14 billion cubic meters. At the end of the last century, the annual output of marine oil reached 3 billion tons, accounting for 50% of the world's total oil production.
2. Solid minerals such as coal and iron. Many of the world's nearshore seafloor have been mined for coal and iron deposits. Japan's seabed coal mining accounted for 30% of its total production; There were also mines in Chili, England, Canada, and Turkey. One of the world's largest iron mines was discovered on the seabed near Kyushu, Japan. Some countries in Asia have also discovered many undersea tin mines. More than 20 kinds of solid minerals have been discovered on the seabed.
3. Seashore placer. There are many precious minerals in the coastal deposits, such as: Rutile containing titanium, the solid fuel used to launch rockets; Monazite that contains Niobium for rockets and aircraft shells, and Tantalum for reactors and microcircuits; It contains high temperature and corrosion-resistant zircotite and zircotite for nuclear submarines and nuclear reactors; In some areas, there were gold, platinum, and silver.
4. Polymetallic Nodules and Cobalt-rich Manganese Crusts. The polymetallic nodulus contained dozens of elements such as Mn, iron, Ni, Cobalt, and copper. There were about 3 trillion tons of polymetallic agglomerations stored at the bottom of the world's oceans, which were 3,500 to 6,000 meters deep. Manganese production could last the world for 18000 years, while nickel-based production could last 25000 years. Countries such as the United States and Japan had already designed some mining systems.
5. Hot liquid mineral deposits. It was a kind of metal that contained a large amount of sulfur. It was formed by the cooling and settling of high-temperature magma spewed out from the undersea rift. More than 30 deposits had been discovered. The United States alone had 25 million tons of reserves in the Galapagos Rift Valley, with a mining value of 3.9 billion US dollars.
6. Combustible ice. It was a new type of mineral known as natural gas hydrates. Under low temperature and high pressure, it was an ice-like solid substance composed of hydrogen compounds and water molecules. It had high energy density, few impurities, almost no pollution after combustion, thick ore layer, large scale, wide distribution, and rich resources. It is estimated that the global reserves of flammable ice are twice the current reserves of oil and natural gas. In the last century, Japan, the former Soviet Union, and the United States had discovered large areas of flammable ice.
So many unexploited mineral resources showed that the seabed of the Earth was indeed almost an " uncultivated virgin land ", once again fundamentally denying the existence of underwater civilization.
This book comes from：m.funovel.com。