Sauropodomorphs included ground-shaking giants like Apatasaurus, and ornithischians included a range of dinosaurs, such as Stegosaurus and Triceratops.

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An employee, a University of Florida archeology student, was using a pneumatic tool to clean a chunk of Wyoming stegosaurus.

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To get your head around geologic time, repeat this mantra: Stegosaurus was as far in the past for Tyrannosaurus Rex as T.

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In 2007, Dinosauria's paleontologists uncovered an unusually complete allosaurus in the Dana Quarry, which proved even more unusual in the laboratory: As the head was chipped from the matrix, a stegosaurus leg bone was found with it.

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Visit the Yale University Art Gallery, which houses more than 185, 000 pieces of international and American art, or the Peabody Museum of Natural History, which displays mounted apatosaurus and stegosaurus dinosaur bones in its great hall.

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