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. The most prominent examples were the Tyrannosaurus rex, Triceratops, …

Dec 22, 2025 · 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 …

Oct 27, 2009 · Dinosaurs mysteriously disappeared at the end of the Cretaceous Period, around 65 million years ago.

Aug 16, 2025 · 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 …

Jul 21, 2024 · Explore the dinosaurs, marine animals, and other life from the Triassic, Jurassic, and Cretaceous periods.

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 …

Jul 31, 2025 · 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 …

Jun 21, 2023 · Learn about the different periods of the dinosaur timeline, from the Triassic to the Cretaceous, and explore the fascinating world of these prehistoric creatures.

Jan 30, 2025 · The Mesozoic Era is often referred to as the “Age of Dinosaurs,” spanning a vast period in Earth’s history. This era, lasting from about 252 million to 66 million years ago, …