Hollow Earth

The concept of Hollow Earth refers to a theoretical idea that suggests the Earth is entirely or largely hollow and may contain subterranean civilizations or vast internal spaces. Historical beliefs about Hollow Earth varied, with some ancient cultures proposing that the Earth had internal cavities or tunnels.

The concept of Hollow Earth in fiction refers to a hypothetical scenario in which the Earth's interior is not solid but instead contains vast, habitable spaces or even entire civilizations. This idea has been popularized in literature, films, and various media and often features fantastical landscapes, unique ecosystems, and advanced beings or prehistoric creatures that inhabit these underground realms.

Hollow Earth proponents are individuals or groups who advocate for the belief in the existence of a hollow Earth. This theory posits that the Earth is not a solid sphere, but rather contains large interior spaces or cavities. Some versions of the Hollow Earth theory suggest that these internal spaces could be inhabited by advanced civilizations or unique ecosystems. Historically, the idea of a hollow Earth has roots in various mythologies and has evolved through literature and pseudoscientific theories.

Agartha is a legendary and mythical concept that refers to a supposed subterranean world or realm that exists within the Earth. It is often associated with ancient myths, esoteric traditions, and various spiritual beliefs. The idea of Agartha has been popularized in various works of literature, mythology, and conspiracy theories. In these traditions, Agartha is often depicted as a utopian civilization, inhabited by advanced beings or enlightened humans who have access to superior knowledge and technology.

The "Hollow Moon" hypothesis is a fringe theory that suggests the Moon is not a solid celestial body, but rather a hollow structure, potentially even an artificial satellite. Proponents of this theory often cite various scientific findings and anecdotal evidence to support their claims, such as the Moon's unusual seismic activity, its density, and its specific orbital characteristics. However, it is important to note that the mainstream scientific community does not support this hypothesis.

Mel's Hole is an urban legend and a supposed "mystery hole" located in Washington State, which gained notoriety through a series of radio broadcasts in the late 1990s. The story originated from a man named Mel Waters, who claimed to have discovered a deep, seemingly bottomless hole on his property. According to Waters, the hole had bizarre properties, such as the ability to seemingly regenerate objects thrown into it, and it was associated with various supernatural and inexplicable phenomena.

"Phantom of the Poles" is a book written by William Reed, published in 1906. The book presents a controversial and largely discredited theory about the existence of a hidden land in the polar regions, specifically in Antarctica. Reed posits that there are openings at the poles that lead to an inner world, suggesting that the Earth is hollow and inhabited by advanced civilizations.