The Younger Dryas impact hypothesis was first proposed in 2007, but no crater from the proposed impact event has been found.
Notes on verification
Multiple independent peer-reviewed sources, including both proponents and critics of the hypothesis, confirm the 2007 origin and the absence of a confirmed impact crater.
Sources
- Did a Comet Really Kill the Mammoths 12,900 Years Ago? (nationalgeographic.com)
- https://www.sciencedirect.com/science/article/abs/pii/S0012825211000262 (sciencedirect.com)
- https://www.sciencedirect.com/science/article/abs/pii/S0012825221001781 (sciencedirect.com)
- https://www.sciencenews.org/article/younger-dryas-comet-impact-cold-snap (sciencenews.org)
- https://sc.edu/study/colleges_schools/artsandsciences/about/news/2024/archaeologists_uncover_new_evidence_for_prehistoric_comet.php (sc.edu)