A scientific study on carbon spherules concluded the particles were of natural biological origin and unrelated to intense wildfires or cosmic impacts.
Sources
- Fungi, Feces Show Comet Didn't Kill Ice Age Mammals? (nationalgeographic.com)
- https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2010GL043345 (agupubs.onlinelibrary.wiley.com)
- https://news.agu.org/press-release/fossil-evidence-casts-doubt-on-younger-dryas-impact-theory/ (news.agu.org)
- https://www.astronomy.com/science/fossil-evidence-casts-doubt-on-younger-dryas-impact-theory/ (astronomy.com)
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