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People have been finding dinosaur fossils for hundreds of years, probably even thousands of years. The first dinosaur to be described scientifically was Megalosaurus. This genus was named in 1824. Sir Richard Owen coined the term dinosauria (from the Greek "deinos" meaning fearfully great, and "sauros" meaning lizard), recognizing them as a suborder of large, extinct reptiles in 1841.
Today we know about dinosaurs mainly because of the fossil remains: of dinosaur bones, dinosaur eggs, dinosaur droppings, and even dinosaur footprints. Nobody knows for sure what a dinosaur sounded like, or even what colour they were. Dinosaurs may live on today! Some dinosaurs were very bird-like, and it is likely that they may have been ancestors of today's birds.