How A Stone-a... - The Cycle Of Cosmic Catastrophes:

The Cycle of Cosmic Catastrophes: How a Stone-Age Comet Changed the Course of World Culture

While many readers find the narrative compelling, the "Younger Dryas Impact Hypothesis" remains controversial. The Cycle of Cosmic Catastrophes: How a Stone-A...

: The authors connect scientific data to global oral traditions, suggesting that ancient legends of worldwide floods and "Thunderbirds" are actually eyewitness accounts of these cosmic impacts. The Cycle of Cosmic Catastrophes: How a Stone-Age

: Distinctive carbon-rich soil layers found at numerous sites, which the authors believe represent the fallout from global wildfires and flooding. Scientific Reception 900 years ago

: Discoveries of radioactive mammoth bones and magnetic microspherules in specific sediment layers.

: A massive comet or fleet of comets struck or exploded over North America around 12,900 years ago, an occurrence the authors simply call "the Event".

: This catastrophe is cited as the primary cause for the sudden disappearance of North American megafauna, such as mammoths and saber-toothed tigers, as well as the collapse of the Paleo-Indian Clovis culture.