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The first dinosaurs appeared about 230 million years ago.

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How did life start after asteroid hit earth and wiped out dinosaurs?

Life did not start after the dinosaurs were wiped out. Life on Earth started billions of years before that. The asteroid wiped out a large portion of life on earth, but not all of it. Some things survived.


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When did the first dinosaurs show up?

The earliest dinosaurs appeared in the Mesozoic era about 248mya-65mya.


How long ago did dinos start to roam Earth?

Dinosaurs stated to appear 240 million years ago.


Dinosaurs that start with the letter s?

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What are dinosaurs that start with q?

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Dinosaurs that start with y?

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Where did vampires first start?

They were created after the dinosaurs, but before humans. No one knows exactly how they were created. I guess the same way we were.


How many year passed the time the dinosaurs were dominant and when the dinosaurs became extinct?

The first date has to be an estimate, but since the dinosaurs effectively dominated the mammals by the start of the Jurassic (201 mya) we could reasonably credit them with 136 million years "in charge" using 65 mya (the end of the Cretaceous and a spectacular change in the fossil record) as the second.


Dinosaurs that start with the letter B?

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Were there dinosaurs in the Paleozoic Era?

No, dinosaurs did not appear until the Mesozoic Era, which followed the Paleozoic Era. Dinosaurs first appeared around 230 million years ago at the start of the Triassic period. The Paleozoic Era ended around 252 million years ago.