Two-thirds of our planet is occupied by the World Ocean, which even in the current century of high technology has been studied only a few percent. In addition, the underwater environment can be attributed to the "inaccessible" regions, especially if we talk about great depths. Every year, scientists say that one new secret of underwater civilizations accounts for several new ones. But can a civilization comparable to ours exist somewhere deep underwater?
Myths and legends
In the epic of many nations, stories about underwater civilizations are captured. For example, in Japan, archaeological expeditions discovered many drawings with images of creatures that look like people, but have membranes on their toes. These images were in the most remote parts of the country. But more interesting is the fact that, in addition to the membranes, the creatures had on their faces something similar to the mask of a diver, from which the tubes went to the device on the back. There is speculation that this is an image of a scuba diver from the ancient world.
Caspian residents even believe that an unknown underwater civilization reigns in the surrounding waters. It is believed that there are even official documents in which oil workers recorded meetings with these creatures.
People out of the ocean?
There is also a version according to which a person used to live in water, but for some reason left this element and subsequently lost contact with it. Experts believe that a drowning person dies not because the lungs are filled with water, but because of the protection of the body - a mechanism is activated that squeezes the ring muscle of the throat, which is why strangulation occurs. If you disable this function, a person could breathe under water with certain physiological changes in the body. For example, in newborns this mechanism is absent, because they feel great in the water and can even swim.
Super abilities
Newborns have another "water" ability. A child inherits certain instincts that will work perfectly until the brain reaches sufficient development to take control of survival. One of these instincts is called the diving reflex, which is also found in animals living in the water: seals, fur seals and others.
How does he work? If a baby submerges in water up to six months old, it will hold its breath reflexively. At this time, the frequency of contractions of the heart muscle will decrease, which will help to preserve oxygen, and the blood circulation will "lean" towards the most vital organs - the heart and brain. With this reflex, an infant can stay under water for much longer than an adult, without serious health consequences.
Man and the ocean
Given this, the idea that a person comes from the waters of the oceans no longer seems so extravagant. If this is true, then certain representatives of the underwater civilization of the Earth who inhabited this element to this day could probably remain there.
One American researcher put forward the theory that such a civilization has existed on our planet for millions of years. Moreover, in his opinion, it is thousands of years ahead of the "land" in development.
Contacts with underwater inhabitants
Fishermen in Japan believe that strange human-like amphibian creatures live in the surrounding waters with something like a shell on their backs. Fishermen claim that they encounter them during their work. But not only in the Land of the Rising Sun they know about underwater civilizations. The facts are this: Sumerologists find many references to fish people who inhabited the waters of the Persian Gulf. Moreover, on ancient clay tablets there are even images of the contacts of these creatures and people.
According to the legend of the Sumerians, it can be judged that the ancient underwater inhabitants taught the local "land" brothers writing, construction, science and agriculture. These creatures were called "oans" and communicated in the local language, but did not eat and went under water at dusk. If we take into account that, according to modern science, life on the planet originated in the ocean, and people have the innate instincts inherent in aquatic creatures, then why not underwater civilization?
Random encounters
In the media, references to meetings of people with intelligent underwater creatures quite often slip through. For example, in 1974, on the Kanin Peninsula in the Nenets Autonomous Okrug, three schoolchildren rested on the banks of a river that flows into the White Sea. A few meters from them, a kind of human-like creature crawled out of the water, possessing a long tail and long black hair covering the whole body. As if on a suction cup, the creature crawled up a steep rock and disappeared. The students called the adults, and they saw strange footprints in the sand, very similar to human ones, but narrower and longer.
Of course, you should not rely on children's imagination, but when military divers say the same thing, there is something to think about.
Mysterious Baikal
Have there been meetings with underwater civilizations in Russia? It turns out yes. This story happened on the shore of Lake Baikal. Exercises were conducted at which combat dives were practiced, and, rising to the surface, one of the divers began to scream. He told his colleagues that during the dive, he saw a humanoid creature next to him, but his height was at least three meters. Following this creature, two more of the same ones sailed. These representatives of underwater civilization were at a depth of fifty meters and dispensed with scuba gear and masks, only in silver suits and helmets resembling a ball.
The leadership of the group decided to delay these entities. This task was given to seven experts, divers, but they not only did not delay the strange creatures, but also paid for their health, and some divers died.
According to survivors, the group managed to track down the creature and throw a network of metal at it, but a sudden strong blow threw the entire group to the surface of the lake. Given that the rise had to take place slowly and with stops in order to avoid decompression sickness, it is not difficult to guess what happened next. The pressure chamber, which prevented decompression sickness, was only one, so three out of seven people died, and irreparable harm was inflicted on the health of the others.
Scientists argue with whom contact will occur faster: with the underwater and underground civilization of our planet or with guests from outer space? Or maybe there has already been contact, but is it kept secret from the public?
Nevertheless, many scientists are skeptical: they do not believe in the existence of underwater cities with humanoid inhabitants. However, the facts confirming this are captured in the photo and video materials. For example, scientists still can not explain the origin of the mysterious underwater vehicles, whose design is unknown to modern science.
Argentina incident
It was 1960, when in the coastal waters of Argentina the crews of two patrol ships witnessed the appearance of giant submarines of unknown design. One of the submarines was at the bottom, but the second appeared on the surface. The sailors of the patrol ship decided to raise objects to the surface by throwing them with depth charges, however, the mysterious underwater vehicles not only survived this attack, but also escaped the patrol ships at a speed that is unusual for even submarines of our time.
When the Argentine military opened fire, the apparatus divided into six smaller boats and disappeared into the depths.
The US military also had experience of "communication" with submarines of unknown origin. Three years after the events in Argentina, a similar incident occurred in the coastal waters of Puerto Rico. An object was recorded that moved under water at a speed of at least three hundred kilometers per hour. This speed is three times higher than the capabilities of the most modern submarines. In addition to all this, the submarine made complex maneuvers both in horizontal and vertical position, which is impossible even with the current technical development of our civilization.
India
And here is another stone in the laying of the theory of the existence of underwater civilizations, and India in this sense is just a diamond, because it was here that scientists discovered the so-called Cambay civilization. Representatives of this ancient culture lived at the end of the last ice age. During this, their territory was flooded, which served as the beginning of a new history. Prior to this discovery, scientists did not suggest that organized civilizations could exist until 5500 BC. Some scholars refused to acknowledge that ancient myths telling about severe floods could have a real motive, but the discovery in the Gulf of India in Cambridge reversed the view of researchers on this issue. And this is only one of the underwater cities of unknown civilizations of the past.
Unidentified flying objects underwater
The Sibin lakes of Kazakhstan are considered a mysterious and interesting place. There is an opinion that it is on this territory that there is an underwater base of an alien civilization. This conjecture is confirmed by hundreds of recorded cases of the appearance of unidentified flying objects that literally dive into the lake and disappear. Researchers have dozens of photographs in their hands, which contain various unidentified flying objects that scan the surface of lakes, dive and fly from the depths. Whether this is true or falsification is still unknown, but the Sibinskie lakes can be a great place for an underwater base due to its depth.
About the underwater world
Ernst Muldashev, an ophthalmologist, doctor of medical sciences and a well-known researcher of the paranormal part of our life, believes that many deep-sea lakes and seas are the bases of a highly developed civilization that also has aircraft at its disposal. It is them, according to Muldashev, that people take for alien ships.
Not so long ago, Russian divers explored the Salem Express steam, which sank in 1991. The expedition members said that during each dive and exploration of the ferry, their group was accompanied by a humanoid creature with long legs and arms. A similar creature was also seen by members of the warship research team sank in the coastal waters of the Philippines. According to their stories, when a dangerous situation arose and the life of the divers was in danger, this creature pushed them out of the water, while the divers did not suffer from decompression sickness.
No contact - why?
One of the main questions that worries both adherents of the theory of underwater civilizations and its opponents is the following: why aren’t they contacting us? For researchers seeking to disprove the existence of humanoid underwater creatures, this is one of the good arguments. And indeed, if they exist, why haven’t they contacted us for so many years? Perhaps our primitiveness is to blame.
If this civilization really has surpassed us in technological development for hundreds of years, then they can simply observe us from the outside, using various equipment or biotechnology, but we don’t even notice it. Moreover, the oceans are only 5% studied by modern science, and then why does it seem surprising to us that these creatures can easily hide from us?
The mystery is not revealed.
People are inclined to convince themselves when meeting a stranger that “it seemed” (the brain is so arranged, he denies and does not perceive any information other than what he was told) or simply ignore it so that others don’t laugh. If such meetings take place with specialists or the military, information about what happened is classified.
Modern explorers of the oceans very rarely turn their attention to ancient legends and myths, but this is an invaluable source of information, and these legends were born in the minds of ordinary people, not fantasists or residents from other planets. Intelligent underwater creatures are mentioned in the epic of all cultures of the world, even those that did not contact each other. From this we can conclude that underwater civilization existed and, perhaps, still exists. Yes, they don’t make contact with us, but they still make themselves felt.
As for the inhabitants of the bowels of the Earth, there is also something to think about. In the course of research, NASA experts, together with French scientists, discovered underground cities and even an extensive network of tunnels and galleries, stretching for tens and thousands of kilometers in Altai, the Urals, Perm Region, Tien Shan, Sahara and South America. And these are not those ancient land cities that collapsed and eventually became covered with a layer of earth and overgrown with forests. These are underground cities and structures erected by an unknown method directly in the rocks.

Someone does not believe in these tales, but someone believes that these tunnels are currently used for underground movements of UFOs and the life of the civilization that inhabits the Earth simultaneously with us. Be that as it may, most are inclined to the idea that we are not alone on the planet. And who knows, perhaps not far off is the day when representatives of underwater and underground civilizations consider it necessary or permissible to contact us.