A fossil Confuciusornis x-ray. An x-ray of the fossil encased in stone can reveal details of the anatomy as well as guide the subsequent separation of the rock layers with minimum damage. While no feathers are visible; this fossil shows characteristics common to dinosaurs and birds. From the exhibit: Feathered Dinosaurs at the San Diego Natural History Museum.

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Photo credit: © William Warren / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -ray, biology, birds, black, california, cladistics, close-, confuciusornis, diego, dinosaurs, enantiornithine, evolution, flight, paleontology, people, photography, san, science, theropods, usa, vertical, white