Dinosaurs: Phenomenal Photos and Fascinating Fun FactsDinosaurs belong to the reptile family. They first appeared around 250 million years ago. Not much is known about the exact origin and time frame they walked the earth.Scientist Richard Owen gave these reptiles the name "dinosaurs". "Dino" means "powerful" in Greek. "Saur" was taken from another Greek word that means "reptile." Together, "dinosaur" means "powerful reptile."
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