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Natural History Museum
nhm.ac.uk โ€บ discover โ€บ when-did-dinosaurs-live.html
When did dinosaurs live? | Natural History Museum
Dinosaurs first appeared in the Triassic Period, around 245 million years ago ... Explore the age of the dinosaurs.

second erathem and era of the Phanerozoic Eonothem and Eon

The Mesozoic Era is the era of Earth's geological history, lasting from about 252 to 66 million years ago, comprising the Triassic, Jurassic and Cretaceous Periods. It is characterized by the dominance โ€ฆ Wikipedia
Factsheet
Etymology
Name formality Formal
Nickname(s) Age of Reptiles, Age of Dinosaurs, Age of Conifers
Factsheet
Etymology
Name formality Formal
Nickname(s) Age of Reptiles, Age of Dinosaurs, Age of Conifers
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Wikipedia
en.wikipedia.org โ€บ wiki โ€บ Mesozoic
Mesozoic - Wikipedia
2 weeks ago - The recent warming led to a boom of dinosaurian evolution on land as the continents began to separate from each other (Nyasasaurus from 243 to 210 million years ago, approximately 235โ€“30 ma, some of them separated into Sauropodomorphs, Theropods and Herrerasaurids), as well as the first ...
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Utah Geological Survey
geology.utah.gov โ€บ home โ€บ popular geology โ€บ dinosaurs & fossils โ€บ age of dinosaurs
Age of Dinosaurs - Utah Geological Survey
January 30, 2023 - Dinosaurs lived during the Mesozoic Era (252 to 66 million years ago), often called the โ€œAge of Dinosaurs.โ€ The Mesozoic Era is divided into three time periods, the Triassic, Jurassic, and Cretaceous.
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ThoughtCo
thoughtco.com โ€บ the-three-ages-of-dinosaurs-1091932
Dinosaurs of the Triassic, Jurassic, and Cretaceous Periods
July 21, 2024 - In brief, this incredibly long period of time, which the dinosaur periods span, measured in "mya" or "millions of years ago," saw the development of dinosaurs, marine reptiles, fish, mammals, flying animals including pterosaurs and birds, and a huge range of plant life. The largest dinosaurs did not emerge until the Cretaceous period, which started over 100 million years after the start of the "age of dinosaurs."
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Dinosaur World Live
dinosaurworldlive.com โ€บ blog โ€บ roaring-through-time-dinosaur-timeline
Roaring through time: Dinosaur timeline
The dinosaurs lived so long ago ... is the age of the dinosaurs spanned an incredible 165 million years, from the Triassic Period to the Cretaceous Period. To help you with your knowledge of the different dinosaurs and when they lived, weโ€™ve created a handy dinosaur timeline...
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USGS
usgs.gov โ€บ faqs โ€บ did-all-dinosaurs-live-together-and-same-time
Did all the dinosaurs live together, and at the same time? | U.S. Geological Survey
The 'Age of Dinosaurs' (the Mesozoic Era) included three consecutive geologic time periods (the Triassic, Jurassic, and Cretaceous Periods). Different dinosaur species lived during each of these three periods.
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Timeline.cat
historytimeline.com โ€บ home โ€บ list of timelines โ€บ geology & natural history โ€บ all timelines
Dinosaur Timeline - HistoryTimeline.com
Dinosaur Timeline
Timeline of popular dinosaur species and the Earth's geological periods they lived in, from 250 mya (million years ago) to 66 mya. Also, historical events related to dinosaurs such as asteroid impacts. Available File Downloads   Dinosaurs.tl (interactive timeline) Dinosarus.pdf (PDF file)
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Britannica Kids
kids.britannica.com โ€บ kids โ€บ article โ€บ dinosaurs-at-a-glance โ€บ 611164
dinosaurs at a glance - Kids | Britannica Kids | Homework Help
Dinosaurs lived from about 245 to 65.5 million years ago. They were common during the Triassic, Jurassic, and Cretaceous geologic time periods. These three periods were part of the Mesozoic era.
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Q-files
q-files.com โ€บ prehistoric โ€บ age-of-dinosaurs โ€บ age-of-dinosaurs
Age of Dinosaurs - Q-files - Search โ€ข Read โ€ข Discover
https://www.q-files.com/prehistoric/age-of-dinosaurs/age-of-dinosaurs ... The Triassic, Jurassic and Cretaceous periods, which lasted from 252 to 66 million years ago, are together known as the Mesozoic Era, but more commonly called the Age of Dinosaurs. The Palaeozoic, the previous era, ended ...
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Snexplores
snexplores.org โ€บ article โ€บ explainer-the-age-of-dinosaurs
Explainer: The age of dinosaurs
March 21, 2025 - Two T. rexes face off over a triceratops corpse. During the three periods of the Age of Dinosaurs, geologic events played a major role in the environmental conditions that led to dinosaur dominance.
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Wikipedia
en.wikipedia.org โ€บ wiki โ€บ Dinosaur
Dinosaur - Wikipedia
18 hours ago - 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.
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The Dinosaurs
thedinosaurs.org โ€บ home โ€บ the three dinosaur periods of the mesozoic era
Dinosaur Periods of the Mesozoic Era Triassic-Jurassic-Cretaceous
April 6, 2025 - It was one of the largest, two-legged carnivore to have ever lived. It could gobble up to 500 pounds of meat in one bite. The age of dinosaurs had been pretty much clear sailing for more than 160 million years across the three dinosaur periods.
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Centre of Excellence
centreofexcellence.com โ€บ the-dinosaur-timeline
The Dinosaur Timeline: A Prehistoric Picture - Centre of Excellence
By the mid-Triassic, the terrestrial environment was almost entirely dominated by therapsids and some archosaurs, a vertebrate group that includes the well-known dinosaurs. The Jurassic period began around 201 million years ago and ended 145 million years ago. This period is known as the Age ...
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Dinosaurjungle
dinosaurjungle.com โ€บ dinosaur_facts_timeline.php
Dinosaur Timeline
Scientists believe the earth was formed around 4,600 million years ago. By about 4,000 million years ago, the earth had cooled sufficiently for liquid water to appear, and the first life appeared soon after. For nearly 3,500 million years, all life was single-celled, but eventually multi-celled ...
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Discover Magazine
discovermagazine.com โ€บ home โ€บ the sciences โ€บ a complete dinosaur timeline to extinction: how long did they roam earth?
A Complete Dinosaur Timeline to Extinction: How Long Did They Roam Earth? | Discover Magazine
June 21, 2023 - The history of dinosaurs spans millions of years. Learn about the different periods of the dinosaur timeline, from the Triassic to the Cretaceous, and explore the fascinating world of these prehistoric creatures.
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FactMonster
factmonster.com โ€บ dk โ€บ encyclopedia โ€บ science โ€บ era-dinosaurs
DK Science: Era Of The Dinosaurs
June 26, 2019 - Dinosaurs roamed the planet for about 165 million years, during a time in the Earthโ€™s history called the Mesozoic Era. It is difficult to imagine how
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Live Science
livescience.com โ€บ animals โ€บ extinct species โ€บ dinosaurs
A brief history of dinosaurs | Live Science
July 6, 2021 - Dinosaurs ruled the Earth for about 174 million years. Here's what we know about their history. When you purchase through links on our site, we may earn an affiliate commission. Hereโ€™s how it works.
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Twinkl
twinkl.com โ€บ teaching-wiki โ€บ dinosaur-periods-timeline
Dinosaur Periods Timeline | Twinkl Teaching Wiki
Twinkl's Teaching Wiki gives explanations of common terms and key vocabulary used in teaching, and shows related Twinkl resources for each term.
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DINOSAUR TRIPS
dinosaurtrips.com โ€บ home โ€บ blog โ€บ intro to dino 101: when was the age of dinosaurs
Intro to Dino 101: When Was The Age of Dinosaurs - DINOSAUR TRIPS
May 4, 2023 - And finally comes the Cretaceous, where youโ€™ll find some of our most famous dinosaurs like the T. Rex and the triceratops, which begins 145 million years ago and came to its dramatic end some 65 million years ago when a massive asteroid struck ...