A new article in the journal Nature co-authored by an Idaho State University paleontologist details how life bounced back after the world’s most severe mass extinction event. Over the last eight years, L.J. Krumenacker, ISU Geosciences adjunct professor and affiliate curator at the Idaho Museum of Natural History, and his co-authors studied 250 million-year-old fossils found in Caribou and Bear Lake Counties in Southeast Idaho as well as specimens from northeastern Nevada.