: The episode highlights the debate between Hancock’s fringe theories and the archaeological consensus that the structures are a result of natural geological processes.
In this episode, journalist and author travels to the Bahamas to investigate underwater geological formations that he believes may be evidence of a lost advanced civilization. Episode Summary
: Hancock poses the question of whether an ancient civilization could have possessed the advanced seafaring skills and knowledge to map the world's oceans thousands of years before recorded history.
: The investigation links these underwater "ghosts" of the past to the broader theme of the series: that a cataclysmic event at the end of the Ice Age wiped out a global, sophisticated precursor civilization. Quick Facts
