Stegosaurs were a genus of ornithischian ("bird-hipped") dinosaurs. There are sevaral known species in the genus, including S. armatus, S. stenops, S. sulcatus, S. longspinus, and the type species, S. armatus. Stegosaur species bore large, distinctive plates protruding from their backs, and spikes on the ends of their tails. While the spikes were likely used for defense, the plates have been subject to a great deal of speculation, with proposed functions including defense and thermoregulation. Although their feeding and diet are not very well-understood, Stegosaurs are known to have had unusual small, peg-shaped teeth that show horizontal wear-marks, suggesting they may have fed by "raking" leaves from branches of the low-lying plants they could reach with their short necks. Stegosaur species have been found in upper Jurassic rocks, from 155 to 150 million years ago. This digital 3D model is a scan of an object found in the American Museum of Natural History. The original object was handled and scanned in the Museum Library, during the Capturing Memories Program. Capturing Memories was a three day program in February, 2014 that brought MOUSEsquads from around the city to work with objects from the Museum Library's memorabilia collection. To scan the original object, iPads were used to take multiple pictures of the object from many different angles. The program 123D catch was used to create digital 3D models from these photographs. The models were cleaned up using the program MeshMixer and then uploaded to Thingiverse. Read an article about Capturing Memories here: http://www.qchron.com/editions/south/kids-become-tech-whizzes-at-jhs/article_a6ebe02a-c9fb-5891-b59c-fc3e4d8f0b40.html#.U5HJL7XeMNk.twitter RESOURCES Dinosaurs: From Allosaurus to Tyrannosaurus. By Gerrie McCall. Published 2005, Chartwell Books Dinosaurs: The Complete Guide to Dinosaurs. By Steve Parker. Published 2009, Museum of Natural HistoryWe used 123d catch and mesh mixer to create the model. Print with both raft and supports, or be very cautious without supports.