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

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

: Distinctive carbon-rich soil layers found at numerous sites, which the authors believe represent the fallout from global wildfires and flooding. Scientific Reception The Cycle of Cosmic Catastrophes: How a Stone-A...

: 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. : Discoveries of radioactive mammoth bones and magnetic

: 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". such as the "black mats