The period featuring the Tyrannosaurus rex and Triceratops, ending with a mass extinction event. Classification and Anatomy Dinosaur Facts | American Museum of Natural History
Often considered the golden age, seeing the rise of giant sauropods and famous predators like Allosaurus . dinosaurs
Dinosaurs lived during three major geological periods collectively known as the "Age of Reptiles": The period featuring the Tyrannosaurus rex and Triceratops,
The earliest dinosaurs appeared, evolving from ancestors that survived the Permian Extinction. dinosaurs