vortex-theory

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.