Donald E. Hurlbert / Smithsonian Institution
Two enormous dinosaurs—Triceratops and Tyrannosaurus rex—reign over the National Museum of Natural History’s new exhibition, “The Last American Dinosaurs: Discovering a Lost World.” The show opens Nov. 25 and tells the story of non-avian dinosaurs’ final years in western North America through an extraordinary diversity of fossil animals and plants from the Hell Creek Formation in North Dakota, South Dakota and Montana. (Photo by Donald H. Hurlbert / Smithsonian Institution)
