How Long Dinosaurs Lived On Earth
How long were dinosaurs on earth? On this page we'll find out how long the 'age of the dinosaurs' lasted. Nosotros'll find out when the first dinosaurs appeared, and when dinosaurs went extinct.
We'll besides take a look at the geological time periods in which dinosaurs inhabited Earth. These are periods of fourth dimension based on layers of rock. They include the Triassic, Jurassic and Cretaceous periods.
At the terminate of the page, you'll find a listing of amazing facts almost how long dinosaurs were on Globe and the immense timespans involved.
- This page is role of a series of articles about dinosaurs. If you want to get an skilful on the bailiwick, visit our master Dinosaur Facts Page!
How Long Were Dinosaurs On Globe?
Dinosaurs were on Earth for between 165 and 177 million years.
They start appeared between 243 and 231 1000000 years ago, during the Triassic period. (Nosotros'll find out more than near the Triassic and other geological periods farther downwards the page).
Dinosaurs became extinct around 66 million years ago. This means that they were on Earth for far longer than they've been extinct.
Dinosaurs were extremely successful, especially when you consider that modern humans (Human sapiens) accept only been around for 200,000 years!
Today, many scientists at present regard birds to exist dinosaurs! This is because during the Jurassic flow a co-operative of dinosaurs began to evolve into birds.
Therefore, when we talk well-nigh 'dinosaurs' on this folio, we're referring to 'non-avian' dinosaurs – i.e. all those dinosaurs that didn't evolve into birds.
Permit's Talk Numbers!
1 one thousand thousand in figures is a 1 followed past Six zeros, eastward.grand. 1,000,000. Therefore, in figures, dinosaurs were on World for every bit long as 177,000,000 years.
That's a long time!
While we're talking big numbers, you may be interested to acquire that World formed around iv.54 billion years ago. Ane billion in figures is a 1 followed by NINE zeros, or: 1,000,000,000.
Therefore, in figures, World formed 4,540,000,000 years ago.
Life began to appear around 3.5 billion (3,500,000,000) years ago
So, in the big scheme of things, even dinosaurs, who were on Earth for 177,000,000 years, are relative newcomers!
When Did Dinosaurs Appear on Earth?
As we've seen, dinosaurs first appeared on Earth betwixt 243 and 231 meg years ago. They evolved from a group of reptiles chosen Archosaurs.
This was during the Triassic menstruum, which is part of what is known as the 'geological timescale'.
The Geological Timescale
In the geological timescale, periods of time correspond to layers of rock. For instance, the Triassic menses refers to the time during which the rock in the Triassic layer was formed.
Just equally days are divided into hours and minutes, etc., so are the units of the geological timescale. An era is divided into periods, which are themselves divided into epochs.
- You can find out more about the geological timescale and the historic period of the dinosaurs hither: Dinosaur Periods.
How Long Were Dinosaurs On Earth: The Mesozoic Era
Dinosaurs were around during the Mesozoic era, which is divided into 3 periods: the Triassic, Jurassic and Cretaceous periods.
Dinosaurs appeared on Earth midway through the Triassic menstruum. They became the dominant land animals near the beginning of the Jurassic period. They were on Earth correct upwardly to the terminate of the Cretaceous period.
At the cease of the Cretaceous period, something happened that acquired the extinction of not only the dinosaurs, but of 75% of all of the species on Earth!
Scientists now think that the most likely explanation for the extinction of the dinosaurs is that Earth was hit past a large asteroid.
- You lot tin find out more about the extinction of the dinosaurs hither: How Big Was The Asteroid That Killed The Dinosaurs?
Are Dinosaurs Really Extinct?
Strictly speaking, dinosaurs still be on World. Every bit we've seen in many of our dinosaur pages, scientists now consider birds to be dinosaurs.
This is because animals are grouped in 'branches'. Considering a group of dinosaurs 'branched off' and evolved into birds, they are withal considered to be dinosaurs.
Therefore, instead of dying out at the end of the Cretaceous periods, dinosaurs are notwithstanding live and well, and living in your dorsum yard!
How Long Were Dinosaurs On Earth – 10 Facts
- Dinosaurs were on Globe for between 165 and 77 one thousand thousand years.
- Dinosaurs first appeared betwixt 243 and 231 1000000 years ago
- This was during the Triassic period
- Dinosaurs evolved from a grouping of reptiles called Archosaurs
- The Triassic – and other periods in the geological timescale – correspond to layers of rock.
- Earth formed around iv.54 billion years ago. (That'due south 4,540,000,000 years ago in figures.)
- Life appeared on World around 3.v billion (3,500,000,000) years ago.
- Homo sapiens (humans) have been on Globe for effectually 200,000 years.
- Many scientists now regard birds to be dinosaurs – therefore dinosaurs are still on Earth!
- All not-avian dinosaurs became extinct at the end of the Cretaceous catamenia, effectually 66 meg years agone.
How Long Were Dinosaurs On Earth – Conclusion7
In this article we've found out that Dinosaurs were on Earth for betwixt 165 and 77 million years. We've also constitute out a lilliputian about the geological timescale, and how many scientists recall that dinosaurs nonetheless be in the class of birds.
We hope that yous have enjoyed learning well-nigh how long dinosaurs were on Earth. IF yous desire to learn more about dinosaurs and the Mesozoic Era, there are plenty more than Agile Wild articles for y'all to bask:
- Go a dinosaur adept – visit our main Dinosaur Facts Folio.
- Learn the names of many mutual (and not so common) dinosaurs here: List of Dinosaurs with Pictures.
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