underwater-civilizations

Part III of "Invisible Residents" by Ivan T. Sanderson includes chapters discussing underwater civilizations and the enigmatic entities termed OINTs, followed by references and appendices on related unexplained phenomena such as missing persons, ancient Indian flying machines (vimanas), and vortex theories. The acknowledgments section credits various sources and individuals who contributed material and support, highlighting the interdisciplinary and collaborative nature of the research into unexplained phenomena.

This chapter proposes the existence of an ancient underwater civilization or civilizations on Earth, either indigenous or extraterrestrial in origin, that have evolved and operated within the planet's hydrosphere. It challenges conventional assumptions about intelligence and technology being limited to terrestrial, atmospheric life forms by arguing that technological development underwater is plausible and may have preceded human civilization. The chapter also explores the vastness of the underwater environment as a potential habitat and the implications of such hidden intelligences for human understanding of life and ufology.