technological-evolution-in-water
The argument that technological advancements, including metallurgy and power generation, could develop underwater despite common assumptions to the contrary.
1 chapter across 1 book
Invisible Residents (1970)Ivan T. Sanderson
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.