: Discoveries of radioactive mammoth bones and magnetic microspherules in specific sediment layers.
: Puzzling elliptical depressions along the U.S. Atlantic coast that the authors link to the impact event. The Cycle of Cosmic Catastrophes: How a Stone-A...
: Distinctive carbon-rich soil layers found at numerous sites, which the authors believe represent the fallout from global wildfires and flooding. Scientific Reception : Discoveries of radioactive mammoth bones and magnetic
