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Hadrosaurs--also known as duck-billed dinosaurs--are abundant in the fossil record. With their unique complex jaws and teeth perfectly suited to shred and chew plants, they flourished on Earth in remarkable diversity during the Late Cretaceous. So ubiquitous are their remains that we have learned more about dinosaurian paleobiology and paleoecology from hadrosaurs than we have from any other group. In recent years, hadrosaurs have been in the spotlight. Researchers around the world have been studying new specimens and new taxa seeking to expand and clarify our knowledge of these marvelous

Dinosaurs. --- Hadrosauridae --- Hadrosauridae. --- Dinosauria --- Reptiles, Fossil --- Duck-billed dinosaurs --- Duckbill dinosaurs --- Hadrosaurs --- Ornithischia --- Geographical distribution. --- Anatomy. --- Dinosaurs --- Anatomy --- Geographical distribution