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

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

: More recent studies have found similar geochemical signals (like high platinum and iridium levels) at dozens of sites worldwide, keeping the debate active in the scientific community.

: 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". The Cycle of Cosmic Catastrophes: How a Stone-A...

While many readers find the narrative compelling, the "Younger Dryas Impact Hypothesis" remains controversial.

: 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. The Cycle of Cosmic Catastrophes: How a Stone-Age

: Some scientists argue that the evidence, such as the "black mats," can be explained by natural environmental changes rather than a comet. Others point out the lack of a clear, single impact crater from this specific timeframe.

The authors highlight several geological markers to support their theory: : This catastrophe is cited as the primary

: Puzzling elliptical depressions along the U.S. Atlantic coast that the authors link to the impact event.