Cataclysm: Compelling Evidence of a Cosmic Catastrophe in 9500 B.C. by D.S. Allan and J.B. Delair argues that a massive cosmic disaster occurred around 11,500 years ago, causing sudden crustal shifts, massive extinctions, and global destruction. Using multidisciplinary evidence—geology, biology, and ancient myths—they contend this event caused the end of the Ice Age, challenging conventional geological theories. The book, originally titled When the Earth Nearly Died, presents a detailed, interdisciplinary case for a major prehistoric, planet-wide disaster.