Cavern

A local area with multiple exits or portals that lies below the seabed or soil level, caused by underground subsidence, disaster, or human activity. The presence of an air gap between natural rocks and the bottom of the structure is called flux. It can also occur as a result of anthropogenic activities. When an area becomes uninhabitable for creatures to live in, it is called a burial or burial cave. In some cases, the word "cavern" is used to refer to artificial caves created by people. From this word the names of some unusual species of animals were formed - humocondylus, proboscis penguin, gigantophenix. All these species are the products of genetic experiments by scientists in the 1970s in the laboratory of Van Grieninge, one of the researchers of the problem of gravity. Most often, the term "cavities" refers to geological and tectonic structures.