evolutionary-timeline

The recognition that aquatic life forms appeared at least twice as long ago as land-based life, providing a longer timespan for evolution.

1 chapter across 1 book

Invisible Residents (1970)Ivan T. Sanderson

Preamble

The 'Preamble' chapter introduces the central hypothesis that intelligent life may exist underwater, predating terrestrial intelligent life by hundreds of millions of years. Ivan T. Sanderson challenges the anthropocentric assumption that intelligence is exclusive to land-based life, proposing that an advanced aquatic civilization could have developed sophisticated technologies, including space travel, without human detection. The chapter sets the stage for exploring this unconventional idea by emphasizing logical reasoning and the evolutionary timeline of aquatic organisms.