The book presents an extensive collection of data concerning phenomena that modern science has historically ignored, excluded, or dismissed as anomalies. Fort analyzes reports of strange falls from the sky, ranging from ordinary stones and meteoric materials to bizarre substances such as colored rains, biological matter, organic debris, and artificial objects. The author poses a fundamental problem regarding the methods of scientific classification and the arbitrary nature of what institutions choose to include as true versus what they condemn as false.
Throughout the text, the argument develops around the idea of continuity, suggesting that positive differences between things are largely illusory. Fort argues that science operates much like a closed system, defending its isolationist view of the earth by excluding irreconcilable facts. By gathering these discarded data, the author seeks to challenge the absolute authority of materialistic science and demonstrate that the recognized systems are merely temporary constructs.
The narrative systematically addresses categories of anomalous events, including mysterious black and red rains, gelatinous substances mistakenly identified as terrestrial algae or spawn, and falls of living organisms like fish, frogs, and various larvae. These occurrences are examined not as mere local atmospheric freak events, but as evidence of external relationships and phenomena originating beyond the earth's immediate environment.
Fort explores the presence of manufactured or shaped objects, such as stone axes, metal items, and coins found in ancient strata or reported to have fallen during storms. These data are used to question conventional archaeological timelines and geological assumptions. The text continually confronts the mechanisms by which orthodoxy explains away these anomalies through convenient dismissals rather than genuine inquiry.
Toward the end, the work synthesizes these observations into a broader metaphysical framework termed intermediatist. Fort suggests that existence is a continuous flux between reality and unreality, and that science's rejection of anomalies is merely a defensive maneuver to maintain the illusion of a complete system. The discussion hints at a broader, unacknowledged interaction between the earth and external cosmic forces.