[PAR] [TLE] Hollow Earth [SEP] The Hollow Earth is a pseudoscience concept proposing that the planet Earth either is entirely hollow or otherwise contains a substantial interior space.  The scientific community has dismissed the notion since at least the late 18th century.  The concept of a hollow Earth recurs many times in folklore and as the premise for subterranean fiction, and a subgenre of adventure fiction ("Journey to the Center of the Earth", "At the Earth's Core").  It is also featured in some present-day pseudoscientific and conspiracy theories. [PAR] [TLE] Subterranean fiction [SEP] Subterranean fiction is a subgenre of adventure fiction or science fiction which focuses on underground settings, sometimes at the center of the Earth or otherwise deep below the surface.  The genre is based on and has in turn influenced the Hollow Earth theory.
[PAR] [TLE] Hollow Earth [ SEP ] The Hollow Earth is a pseudoscience concept proposing that the planet Earth either is entirely hollow or otherwise contains a substantial interior space . The scientific community has dismissed the notion since at least the late 18th century . The concept of a hollow Earth recurs many times in folklore and as the premise for subterranean fiction , and a subgenre of adventure fiction ( " Journey to the Center of the Earth " , " At the Earth 's Core " ) . It is also featured in some present - day pseudoscientific and conspiracy theories . [PAR] [TLE] Subterranean fiction [ SEP ] Subterranean fiction is a subgenre of adventure fiction or science fiction which focuses on underground settings , sometimes at the center of the Earth or otherwise deep below the surface . The genre is based on and has in turn influenced the Hollow Earth theory .
Subterranean fiction and the Hollow Earth theory are based on what kind of concept?
Subterranean fiction and the Hollow Earth theory are based on what kind of concept ?
a pseudoscience
a pseudoscience