Dinosaurs lived during three major geological periods collectively known as the "Age of Reptiles":
The period featuring the Tyrannosaurus rex and Triceratops, ending with a mass extinction event. Classification and Anatomy Dinosaur Facts | American Museum of Natural History dinosaurs
The earliest dinosaurs appeared, evolving from ancestors that survived the Permian Extinction. their legacy continues through modern birds
were a diverse group of reptiles that dominated terrestrial ecosystems for approximately during the Mesozoic Era . While most became extinct around 66 million years ago, their legacy continues through modern birds, which are their direct descendants. Geological Timeline dinosaurs
Often considered the golden age, seeing the rise of giant sauropods and famous predators like Allosaurus .