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Dinosaur - Wikipedia They first appeared during the Triassic period, between 243 and 233 23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is a subject of active research
Dinosaur | Definition, Types, History, Names, Facts | Britannica Dinosaurs are a diverse group of reptiles that were the dominant terrestrial life form on Earth during the Mesozoic Era, about 245 million years ago Dinosaurs went into decline near the end of the Cretaceous Period, about 66 million years ago
When did dinosaurs live? - Natural History Museum Non-bird dinosaurs lived between about 245 and 66 million years ago, in a time known as the Mesozoic Era This was many millions of years before the first modern humans, Homo sapiens, appeared Scientists divide the Mesozoic Era into three periods: the Triassic, Jurassic and Cretaceous
When Dinosaurs Roamed the Earth: A Prehistoric Timeline The era when dinosaurs flourished is known as the Mesozoic Era, often called the “Age of Dinosaurs ” This vast geological interval began approximately 252 million years ago and concluded around 66 million years ago
How Did Dinosaurs Live and Thrive for Millions of Years? The age of dinosaurs—also known as the Mesozoic Era—is divided into three periods: the Triassic, the Jurassic, and the Cretaceous This stretch of time, from about 252 to 66 million years ago, saw Earth undergo dramatic transformations
Dinosaur Periods of the Mesozoic Era: Exploring Earth’s Ancient Giants During the Triassic Period, dinosaurs first appeared, marking a significant point in evolutionary history The Jurassic Period followed, showcasing the rise of large herbivores and fierce predators, while the Cretaceous Period introduced some of the most famous dinosaurs, like T rex and Triceratops
The Three Dinosaur Periods of the Mesozoic Era Dinosaurs dominated the Mesozoic Era for more than 160 million years, peaking during the late Jurassic to early Cretaceous periods They are thought to be the most successful animals ever to walk the earth
A Complete Dinosaur Timeline to Extinction: How Long Did They Roam . . . Dinosaurs roamed Earth for millions of years, during a major geologic era known as the Mesozoic Fossils, scientific discoveries and tireless research efforts have gradually unveiled the mesmerizing tapestry of the dinosaur timeline