Dinosaurs were a diverse group of reptiles that lived millions of years ago during the Mesozoic Era, which spanned from about 252 to 66 million years ago. They were incredibly varied in terms of size, shape, and behavior. Some well-known types of dinosaurs include the Tyrannosaurus rex, Velociraptors, Brachiosaurus, and Triceratops.
Dinosaurs first appeared in the Late Triassic period and dominated the Earth until their extinction at the end of the Cretaceous period, likely due to a combination of factors such as asteroid impacts and volcanic activity.
If you have specific questions or want to know more about a particular aspect of dinosaur history, feel free to ask!
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