Discover Magazine
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A Complete Dinosaur Timeline to Extinction: How Long Did They Roam Earth? | Discover Magazine
June 21, 2023 - Sign up for our email newsletter for the latest science newsSign Up · Dinosaurs roamed Earth for millions of years, during a major geologic era known as the Mesozoic.
Encyclopedia Britannica
britannica.com › science › earth science, geologic time & fossils › dinosaurs
How Long Did Dinosaurs Live? | Extinct, Time Span, & Facts | Britannica
June 20, 2025 - Dinosaurs roamed the Earth for an impressive span of about 165 to 180 million years. They perished in a mass extinction event about 66 million years ago.
Videos
The Very Long Time of the Dinosaurs! | History of Life ...
15:02
The Entire Dinosaur Era Explained in 15 Minutes... - YouTube
r/Dinosaurs on Reddit: Isn't it crazy how long dinosaurs actually ...
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How Long Did The Dinosaurs Actually Survive After The Asteroid? ...
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When Dinosaurs Roamed The Earth - YouTube
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What Was the Earth Like When Dinosaurs Were Around? - YouTube
Reddit
reddit.com › r/showerthoughts › dinosaurs existed for a good 165,000,000 years meanwhile we’ve only existed for some 300,000
r/Showerthoughts on Reddit: Dinosaurs existed for a good 165,000,000 years meanwhile we’ve only existed for some 300,000
January 3, 2024 -
I never really see anyone talk about just how long dinosaurs ruled the Earth for compared to our measly existence. It really is just due to the most obscene chance that we exist… The kings of the world wiped out by some random rock hurtling through space that happened to hit our tiny planet. I can’t help but wonder how different things would be today had they survived.
edit: yeah, it really was just a shower thought. People have been quick to point out how meaningless the term ‘dinosaur’ is in this comparison
CK-12 Foundation
ck12.org › all subjects › earth science › age of earth › how long did dinosaurs roam the earth?
Flexi answers - How long did dinosaurs roam the Earth? | CK-12 Foundation
September 11, 2025 - Dinosaurs roamed the Earth for a really long time! They first appeared during the Triassic period, about 230 million years ago, and they were around until the end of the Cretaceous period, about 65 million years ago. That means dinosaurs were on Earth for around 165 million years!
USGS
usgs.gov › faqs › when-did-dinosaurs-become-extinct
When did dinosaurs become extinct? | U.S. Geological Survey
Dinosaurs went extinct about 65 million years ago (at the end of the Cretaceous Period), after living on Earth for about 165 million years. If all of Earth time from the very beginning of the dinosaurs to today were compressed into 365 days ...
Imperial College London
imperial.ac.uk › stories › dinosaur-doom
The dinosaurs: From dominance to doom
The dinosaurs: From dominance to doom - They roamed our planet over 66 million years ago, yet dinosaurs continue to teach us new things about life on Earth.
Natural History Museum
nhm.ac.uk › discover › when-did-dinosaurs-live.html
When did dinosaurs live? | Natural History Museum
These are some of the largest animals to have ever walked the Earth. By the end of the Jurassic their herds dominated the landscape. ... During the Cretaceous the land separated further into some of the continents we recognise today, although in different positions. This meant that dinosaurs evolved independently in different parts of the world, becoming more diverse. Sauropods reached their largest sizes in the Cretaceous. The biggest were the titanosaurs. Patagotitan was a staggering 37.5 metres long!
Scientific American
scientificamerican.com › article › was-the-dinosaurs-long-reign-a-fluke
Was the Dinosaurs' Long Reign on Earth a Fluke? | Scientific American
February 20, 2024 - Dinosaurs stomped all over the planet for millions of years. Now some researchers think it was more a matter of luck than vigor
Brainly
brainly.com › biology › high school › how many years did dinosaurs roam the earth according to the fossil record?
[FREE] How many years did dinosaurs roam the Earth according to the fossil record? - brainly.com
The dinosaur age lasted for tens of millions of years, dominating the Mesozoic era, also known as the "Age of Reptiles." However, according to the fossil record, dinosaurs roamed the Earth for about 165 million years.
Quora
quora.com › How-long-were-dinosaurs-on-Earth-compared-to-humans
How long were dinosaurs on Earth compared to humans? - Quora
Answer (1 of 44): Okay, first let's ... be prefaced by what you mean by “human”. Dinosaurs were around for roughly 150-160 million years, c......
Better Planet Education
betterplaneteducation.org.uk › factsheets › dinosaurs-when-did-the-dinosaurs-live-on-earth
Dinosaurs - When did the Dinosaurs Live on Earth? | Better Planet Education
Dinosaurs - When did the Dinosaurs Live on Earth? - Dinosaurs are a group of reptiles that dominated the land for over 140 million years during the Mesozoic era, a period of time which extended from approximately 225 million to 65 million years ago.
Teachmetruth
teachmetruth.com › blog › when-did-dinosaurs-roam-the-earth
When Did Dinosaurs Roam the Earth?
About 65 million years ago a massive asteroid took out the dinosaurs.
Dino-walk
dino-walk.com › news › when-did-dinosaurs-live.html
When Did Dinosaurs Live? Timeline & Prehistoric Facts
When did dinosaurs live? This question fascinates scientists and dinosaur enthusiasts alike. Dinosaurs roamed the Earth for millions of years, long before modern humans appeared. Non-bird dinosaurs lived between approximately 245 and 66 million years ago, during a period known as the Mesozoic Era.
Active Wild
activewild.com › home › how long were dinosaurs on earth? dinosaur history & the mesozoic era
How Long Were Dinosaurs On Earth? A Brief History Of The Mesozoic Era
April 22, 2017 - How long were dinosaurs on Earth. Dinosaurs were on Earth for between 165 & 177 million years from the mid Triassic to the end of the Cretaceous period.
A-Z Animals
a-z-animals.com › animals home › articles › how long were dinosaurs on earth?
How Long Were Dinosaurs on Earth? - A-Z Animals
May 5, 2025 - Dinosaurs first arose in the Middle to Late Triassic Period about 230 to 240 million years ago. At this time, the landmass of Earth was one large continent called Pangea. A massive extinction event called the Permian mass extinction occurred ...
Quora
quora.com › How-old-was-Earth-when-dinosaurs-were-around-and-did-any-live-to-see-humans-come-about
How old was Earth when dinosaurs were around and did any live to see humans come about? - Quora
Dinosaurs first emerged a little while after the devastation of the Permian Mass Extinction. We aren't absolutely positive of the time, but it was between 233 and 240 million years ago. That means the Earth was rough...
USGS
usgs.gov › faqs › where-did-dinosaurs-live
Where did dinosaurs live? | U.S. Geological Survey
(Using this same time scale, the Earth would have formed... ... Dinosaurs went extinct about 65 million years ago (at the end of the Cretaceous Period), after living on Earth for about 165 million years.
Vocal Media
vocal.media › history › how-long-did-dinosaurs-populate-the-earth
How Long Did Dinosaurs Populate the Earth? | History
Dinosaurs ruled the Earth for a staggering 180 million years, evolving and diversifying across various geological periods. Their extinction, likely caused by a catastrophic asteroid impact, marked the end of an era but opened the door for the ...
USA Today
usatoday.com › story › news › nation › 2020 › 03 › 10 › dinosaur-days-days-were-half-hour-shorter-when-dinosaurs-roamed-earth › 5010978002
Days were a half-hour shorter when dinosaurs roamed the Earth 70 million years ago
March 10, 2020 - When dinosaurs roamed the Earth, days were about a half-hour shorter than they are today, a new study says.
Live Science
livescience.com › animals › extinct species › dinosaurs
A brief history of dinosaurs | Live Science
July 6, 2021 - Dinosaurs ruled the Earth for 135 million years. There were many types of dinosaurs, in all shapes and sizes.