Title: Attack! Contact: Laurie O'Keefe Description: A Chasmosaurus uses its massive frill and horns to defend itself against a Daspletosaurus in the Late Cretaceous. Watercolor/airbrush illustration created for Sam Noble Oklahoma Museum of Natural History-Ancient Life Exhbit. Keywords: Mesozoic, horned dinosaur, ceratopian, armor, carnivorous, extinction Media: Color Categories: Nature, Science Subject(s): Animal, Dinosaurs, Paleontology, Vertebrates, Editorial, Storybook Displaying image 16 of 74. Gallery of Laurie O'Keefe Email Laurie O'Keefe about this image. Copyright 2002 Laurie O'Keefe. This image is available for reuse purchase. Please review the Comp. Usage Agreement before downloading this image. To email this image to someone else, copy and paste this address: http://www.science-art.com/image.asp?id=455&m=58