Antonio Zamora | Podcast YD020 - Cycle of Cosmic Catastrophes @Antonio_Zamora | Uploaded November 2021 | Updated October 2024, 6 hours ago.
A book published in 2006 proposed that a cosmic chain of events culminated in the extinction of the megafauna approximately 13,000 years ago. This book established what was later called the Younger Dryas Impact Hypothesis.