Ordo ab Chao
Order from Chaos
The Comet Cometh
The earliest known hypothesis about a comet that had a widespread effect on human populations can be attributed to Edmond Halley, who in 1694 suggested that a worldwide flood had been the result of a near-miss by a comet.[46][47] The issue was taken up in more detail by William Whiston, a protégé of and popularizer of the theories of Isaac Newton, who argued in his book A New Theory of the Earth (1696) that a comet encounter was the probable cause of the Biblical Flood of Noah in 2342 BCE.[48] Whiston also attributed the origins of the atmosphere and other significant changes in the Earth to the effects of comets.[49]
In Pierre-Simon Laplace's book Exposition Du Systême Du Monde (The System of the World), first published in 1796, he stated:[50]
[T]he greater part of men and animals drowned in a universal deluge, or destroyed by the violence of the shock given to the terrestrial globe; whole species destroyed; all the monuments of human industry reversed: such are the disasters which a shock of a comet would produce.[51][52]
A similar hypothesis was popularized by Minnesota congressman and pseudoarchaeology writer Ignatius L. Donnelly in his book Ragnarok: The Age of Fire and Gravel (1883), which followed his better-known book Atlantis: The Antediluvian World (1882). In Ragnarok, Donnelly argued that an enormous comet struck the Earth around 6,000 BCE to 9,000 BCE,[b] destroying an advanced civilization on the "lost continent" of Atlantis. Donnelly, following others before him, attributed the Biblical Flood to this event, which he hypothesized had also resulted in catastrophic fires and climate change. Shortly after the publication of Ragnarok, one commenter noted, "Whiston ascertained that the deluge of Noah came from a comet's tail; but Donnelly has outdone Whiston, for he has shown that our planet has suffered not only from a cometary flood, but from cometary fire, and a cometary rain of stones."[55]
https://en.wikipedia.org/wiki/Flood_myth