Cast of <i>Stegosaurus stenops</i> fossil at National Museum of Natural History. Washington, DC.

Cast of <i>Stegosaurus stenops</i> fossil (Late Jurassic 150 million years ago) at National Museum of Natural History. Washington, DC.

Cast of Stegosaurus stenops fossil (Late Jurassic 150 million years ago) at National Museum of Natural History. Washington, DC.
Photo by Jim Steinhart © 2013, all rights reserved. (Ref: DCMN121)

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Smithsonian National Museum of Natural History, Washington, DC