Claims
A cosmic impact triggered the Younger Dryas cooling roughly 12,900 years ago
Unproven What these labels mean →Hancock and Carlson say a cosmic impact around 12,900 years ago triggered the Younger Dryas and a '1,200 years of hell on Earth.' The Younger Dryas Impact Hypothesis (Firestone/Kennett et al., 2007-) is actively contested: Holliday et al. (2023) published a comprehensive refutation, and Sweatman/Moore/Powell and others have published rebuttals (2024-26).
Evidence
| Relation | Record | Note |
|---|---|---|
| documents | cosmictusk.com | Holliday et al. 2023, comprehensive refutation |
| corroborates | sciencedirect.com | Earth-Science Reviews 2024, rejection of Holliday et al. |
| corroborates | skepticalinquirer.org | Skeptical Inquirer 2025 |
Sources
| Source | Relation | At |
|---|---|---|
| Hancock and Carlson on JRE 1897 (Younger Dryas) | reports |
Claim
Hancock and Carlson say a cosmic impact around 12,900 years ago triggered the Younger Dryas and a '1,200 years of hell on Earth.' The Younger Dryas Impact Hypothesis (Firestone/Kennett et al., 2007-) is actively contested: Holliday et al. (2023) published a comprehensive refutation, and Sweatman/Moore/Powell and others have published rebuttals (2024-26).