Dinosaur Fossils Cretaceous Period Paleobiology Jurassic Period Fossil Discovery Fossil Analysis Fossilization Triassic Period Paleoecology Late Cretaceous Cyanobacteria Fossils Isotope Analysis Morrison Formation Fossil Sites Dating Methods Chemical Fossils Dinosaur Footprints Trace Fossils Footprint Analysis Excavation Fossil Identification Oligocene Epoch Petrified Forest National Park Blackleaf Formation Dating Techniques Chorrillo Formation Archosaurs Petrified Wood Hominid Fossils Paleoenvironments Egg Fossils Mass Extinction Paleogeography Ancient Marine Life Opal Fossils Paleontology Soft-bodied Fossils Sediment Analysis Opalization Fossil Record Pterosaur Fossils Carboniferous Period Rock Identification Footprints Dental Analysis Microfossils Sedimentary Rock Oldest Fossils Thylakoid Membranes Ancient Organisms Fossil Preservation Discovery Marine Fossils Cretaceous Fossils Extinct Species Migrations Gut Contents
Cell-level preservation reveals keratinized spikes unlike any previously seen in dinosaurs.
