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. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.95 clusters=3 claim_tier=notable]
Sources
- Did a Comet Really Kill the Mammoths 12,900 Years Ago? (seed:history_and_archaeology)
- https://www.sciencedirect.com/science/article/abs/pii/S0012825211000262 (corroboration)
- https://www.sciencedirect.com/science/article/abs/pii/S0012825221001781 (corroboration)
- https://www.sciencenews.org/article/younger-dryas-comet-impact-cold-snap (corroboration)
- https://sc.edu/study/colleges_schools/artsandsciences/about/news/2024/archaeologists_uncover_new_evidence_for_prehistoric_comet.php (corroboration)