On this date, the British physician, geologist, and paleontologist Gideon Algernon Mantell was born. He discovered 4 of the 5 genera of dinosaurs known during his time.
Mantell’s life-long hobby was all-consuming. While walking with his wife in 1822, he discovered fossils that he identified as teeth. When he saw the connection with teeth of the present lizard, the iguana, in 1825, he named the animal the Iguanadon (“fossil teeth”). Subsequently, he made additional finds of fossil bones of other large animals which he described accurately: the Hylaeosaurus, Pelorosaurus, and Regnosaurus. His contemporary, paleontologist Sir Richard Owen, coined the word dinosaur (“terrible lizards”). Mantell’s books include Medals of Creation (1844).