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Building a Dinosaur
NMNH scientists are replicating dinosaur bones and modeling dinosaur movement.

Ceratosaurus nasicornis

photo by unknown Smithsonian photographer

Catalogue number: USNM 4735
Collected in 1883 by M.P. Felch in Fremont County, Colorado
Jurassic Period, about 150 million years ago

This is the most famous and most complete specimen of Ceratosaurus known. It was placed on exhibit in 1910. The skull is a cast. The natural skull is housed in the collections because paleontologists use it extensively for research.

Museum of
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Smithsonian Institution

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