Paleontologists discover “one-in-a-million” fossil with 450-million-year-old soft tissue

Paleontologists at the University of Oklahoma have identified an exceptionally rare fossil of *Dendrocrinus simcoensis*, a crinoid from 450 million years ago, that preserves soft tissue structures—specifically tube feet—marking only the second known example of fossilized soft tissue in crinoids and the oldest ever documented. The delicate structures, which typically decay before fossilization, survived half a billion years in conditions that acted like a natural refrigerator, providing direct evidence of how these early marine animals fed and moved through ancient oceans. The discovery offers researchers unprecedented insight into the anatomy and behavior of creatures that thrived in Earth's earliest coral reefs, long before dinosaurs appeared.