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. This era ended up introducing some of the most famous dinosaurs in the history of the dinosaur timeline.
Understanding the Context
The most prominent examples were the tyrannosaurus rex, triceratops,. Learn the complete timeline of dinosaurs on earth, understanding when they lived and how scientists uncovered their ancient history. Dive into the mesozoic era and beyond as we uncover the fascinating lives of dinosaurs, titanoboa, megalodon, and other ancient creatures that once roamed earth. Non-bird dinosaurs lived between about 245 and 66 million years ago, in a time known as the mesozoic era.
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Key Insights
This was many millions of years before the first modern humans, homo.