Cast of <i>Tyrannosaurus rex</i> skull at National Museum of Natural History. Washington, DC.

Cast of <i>Tyrannosaurus rex</i> skull (Late Cretaceous 70 million years ago) at National Museum of Natural History. Washington, DC.

Cast of Tyrannosaurus rex skull (Late Cretaceous 70 million years ago) at National Museum of Natural History. Washington, DC.
Photo by Jim Steinhart © 2013, all rights reserved. (Ref: DCMN195)

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Smithsonian National Museum of Natural History, Washington, DC