Hollow earth theory

According to the hollow earth hypothesis,planet eart is either wholly hollow or otherwise containa a sunstantial interior space.The hypothesis has long been contradicted by overwhelming observational evidence, as well as by the modern understanding of planet formation;the scientific community has dismissed the notion since at least the late 18th century.
The concept of a hollow Earth still recursin folklore and as the premise for a subgenre of adventure fiction.It also features in some presentday pseudoscientific and conspirancy theories.
Underground civilizations link with the "Hollow Earth Theory.These are supposedly races that excist in subterranean cities beneath planet eart.Very often these dwellers of the world beneath are more technologically advance than we are on surface.Some beliwve that UFO are not from other planets ,but are manufactured by strange beings in the interior of the Earth.
"Conventional hollow earth theories"
Early history
In ancient times the idea of subterranean realms seemed arguable,and become intertwind with the concepts of "places such as the greek Hades,the Nordic svartalfheim, the christian hell,and the jewishcSheol.
EDMOND HALLEY in 1962 put forth the idea of earth consisting of a hollow shell about 800km(500miles)thick, two inner concentric shells and an innermost core, about the diameters of planets Venus ,Mars,and Mercury.Atmospheres separates these shells,and each shell has its own magnetic poles.The spheres rotate ar different speeds.Halley proposed this scheme in order to explain anomalous compass readings.He envisaged the atmosphere inside as luminous and spectulated that escaping gas caused the Aurora Borealis.
De camp and ley have claimed that Leonhard Euler also proposed a hollow-Earth idea,getting rid of a multiple shells and postulating an interior sun 1000km across to provide light to advance inner earth civilization.However in his letters to a German princess Euler describe a thought experiment involving a patently solid earth.
De camp and ley also claims that sir John leslie expanded on Euler's idea,suggesting two central suns named Pluto and Proserpine.Leslie did propose a hollow earth in his 1829 elements of philosopy,But does not mention interior sun.
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