British geologist and paleontologist Gideon Mantell is famous for his contributions to the scientific discovery of dinosaurs. In 1825, he described and validly named the second dinosaur genus, Iguanodon. In 1833, he described another dinosaur, which was later used, along with Iguanodon and Megalosaurus, to define Dinosauria. A gunpowder explosion at a quarry in Tilgate Forest, West Sussex, revealed a collection of about fifty fossil bone pieces that were acquired by Mantell in 1832. Mantell discovered that the pieces could be combined into a single, partially articulated skeleton, the most complete dinosaur skeleton known at the time.
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