Search results
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.
Jun 21, 2023 · Dinosaurs lived for millions of years, from the Triassic to the Cretaceous periods, and survived two mass extinctions. Learn about their evolution, diversity and extinction in this comprehensive article.
- Sean Mowbray
- Boundaries
- Life and Climate
- Extinctions
English geologist John Phillips, the first person to create the global geologic timescale, first coined the term Mesozoic in the 1800s. Phillips found ways to correlate sediments found around the world to specific time periods, said Paul Olsen, a geoscientist at the Lamont-Doherty Earth Observatory at Columbia University in New York. The Permian-Tr...
The Mesozoic era began roughly around the time of the end-Permian extinction, which wiped out 96 percent of marine life and 70 percent of all terrestrial species on the planet. Life slowly rebounded, eventually giving way to a flourishing diversity of animals, from massive lizards to monstrous dinosaurs. The Triassic period, from 252 million to 200...
The Mesozoic era was bookended by two great extinctions, with another smaller extinction occurring at the end of the Triassic period, Olsen said. Around 252 million years ago, the end-Permian extinction wiped out most life on Earth over about 60,000 years, according to a February 2014 study in the journal Proceedings of the National Academy of Scie...
Jan 20, 2019 · Learn about the Triassic, Jurassic, and Cretaceous periods, when dinosaurs ruled the Earth. See the key features, animals, and plants of each age and how they changed over time.
- Bob Strauss
Dec 3, 2021 · Learn about the Mesozoic Era, when dinosaurs ruled the Earth for 186 million years. Discover how volcanism, climate change and continental drift shaped the evolution and extinction of these prehistoric creatures.
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.
Oct 27, 2009 · 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...
