Fungal proliferation before and after the Cretaceous–Paleogene mass extinction event in North America

Proceedings of the National Academy of Sciences, Volume 123, Issue 20, May 2026. <br/>SignificanceFungal proliferation in geologic samples can signify major ecosystem disruptions. Such spikes are documented globally for the Permian-Triassic extinction but for the Cretaceous–Paleogene extinction have been reported previously only in New …