The Triassic, Jurassic, and Cretaceous Periods - ThoughtCo
2024年7月21日 · Ages of the Dinosaurs (The Mesozoic Era) This chart is a simple overview of the Triassic, Jurassic, and Cretaceous periods, all of which were part of the Mesozoic era.
Dinosaur - Wikipedia
Dinosaurs are a diverse group of reptiles [ note 1 ] of the clade Dinosauria. 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.
When did dinosaurs live? - Natural History Museum
Find out when dinosaurs first appeared and what the world was like during the Triassic, Jurassic and Cretaceous periods until non-bird dinosaurs died out. Explore the age of the dinosaurs, from the time they first appeared to the mass extinction 66 million years ago.
Dinosaurs ‑ Extinction, Timeline & Definition - HISTORY
2009年10月27日 · The prehistoric reptiles known as dinosaurs arose during the Middle to Late Triassic Period of the Mesozoic Era, some 230 million years ago. They were members of a subclass of reptiles called...
Dinosaur Periods: Facts on the Triassic, Jurassic & Cretaceous Periods
2016年8月1日 · Dinosaurs started to appear around 243 to 231 million years ago, during the Triassic Period. Dinosaurs are among the most successful groups of animals ever to have lived. They walked the Earth for around 170 million years.
Timeline of Dinosaurs - Science Facts
These prehistoric creatures lived on Earth for over 170 million years, and during that time, they evolved and diversified into a wide range of species. The timeline of dinosaurs can be divided into three main periods: Triassic, Jurassic, and Cretaceous.
Age of Dinosaurs - Utah Geological Survey
Dinosaurs lived during the Mesozoic Era (252 to 66 million years ago), often called the “Age of Dinosaurs.” The Mesozoic Era is divided into three time periods, the Triassic, Jurassic, and Cretaceous.
Mesozoic - Wikipedia
Dinosaurs first appeared in the Mid-Triassic, and became the dominant terrestrial vertebrates in the Late Triassic or Early Jurassic, occupying this position for about 150 or 135 million years until their demise at the end of the Cretaceous.
Explainer: The age of dinosaurs - Science News Explores
2021年12月3日 · Take a trip back to the Mesozoic Era to explore how geologic events, ecosystems and evolution were connected during the so-called age of dinosaurs.
Dinosaur | Definition, Types, History, Names, & Facts | Britannica
2024年10月7日 · Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago and thrived worldwide for nearly 180 million years. Most died out by the end of the Cretaceous Period.