Ivan T. Sanderson
1 book · 1970 · non-fiction, paranormal, marine mysteries
Bibliography
Themes
underwater civilizationsmysteries of the oceanextraterrestrial/unknown life formsunexplained phenomena
Key Concepts
underwater-civilizations2aquatic-intelligence1evolutionary-timeline1advanced-civilization1undetected-technology1oint-entities1ancient-technology1vortex-theory1antarctic-mysterious-incident1limitations-of-scientific-knowledge1ufo-variety-and-nature1official-skepticism-and-cover-up1misconceptions-about-ufo-terminology1vile-vortices1lozenge-shaped-areas1ocean-surface-currents1disappearance-vs-sinking1skepticism-of-ufo-theories1aquatic-origin-of-life1technological-evolution-in-water1