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| Dinosaurs are a group of extinct reptiles that lived on Earth during the Mesozoic Era, which spanned from about 252 million years ago to 66 million years ago. They were incredibly diverse, ranging in size from tiny creatures no larger than a chicken to massive behemoths like the long-necked Apatosaurus and the fearsome Tyrannosaurus rex.Dinosaurs are often divided into two main groups: the Saurischia and the Ornithischia. The Saurischia included the long-necked sauropods and the meat-eating theropods like T. rex, while the Ornithischia included herbivorous dinosaurs like Triceratops and Stegosaurus.One of the most fascinating things about dinosaurs is their incredible diversity. Some were fast and agile, while others were slow-moving and heavily armored. Some were covered in feathers, while others had tough, scaly skin. Many dinosaurs also had unique adaptations, such as the elongated neck of the Brachiosaurus or the bony plates that lined the back of the Stegosaurus.Dinosaurs are believed to have gone extinct around 66 million years ago, likely as a result of a catastrophic asteroid impact that caused massive climate change and widespread devastation. Despite their extinction, dinosaurs continue to capture our imaginations and inspire awe with their incredible size, strength, and diversity. |