Psittacosaurus

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tags: researchblogging.org, social behavior, evolution, Psittacosaurus, ornithischian dinosaur Triceratops. Image: Dinosaur Collector Triceratops are among the most recognizable dinosaurs because of their distinct appearance. They had a large and elaborate bony shield around the back of their head, horns that jut out from the top of their head and nose like spears, and bony knobs…