Exceptionally preserved 551-million-year-old site suggests #AvalonBiota lasted longer https://phys.org/news/2026-02-exceptionally-million-year-site-avalon.html paper: https://pubs.geoscienceworld.org/gsa/geology/article-abstract/doi/10.1130/G54217.1/725338/Ediacaran-endlings-from-the-Avalon-Assemblage-and

"That loss of diversity in the late #Ediacaran has long been recognized as the #KotlinCrisis, making it the first #extinction event that #animals ever experienced. The percentage of known macroorganisms that went #extinct at the Kotlin Crisis event is, in light of this newly published study, considered to be around 80%"