Firestone, Kennett, West, and colleagues argued in a 2007 paper in Proceedings of the National Academy of Sciences that Earth experienced an extraterrestrial impact around 12,900 years ago at the onset of the Younger Dryas stadial.
Sources
- An independent evaluation of the Younger Dryas - jstor (jstor.org)
- https://www.pnas.org/doi/10.1073/pnas.0706977104 (pnas.org)
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1994902/ (ncbi.nlm.nih.gov)
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