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Non-avian dinosaurs existed from around 230 million years ago in the Triassic period until the end of the Cretaceous period, 65 million years ago. The cause of their extinction is most likely an asteroid impact coupled with environmental change.
Wiki User
∙ 8y ago
Wiki User
∙ 13y ago65.5 million years ago was when they became extinct and they first evolved about 225 million years ago.
Wiki User
∙ 12y agoI could be wrong, but I believe it is the Jurassic times and only then.
Wiki User
∙ 12y agoA Dinosaurs lived for 25000 years
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How many kinds of dinosaurs in the world?
There are over 1,000 species from 500 genera of extinct, non avian dinosaurs that have been found, which is estimated to only be a tiny fraction of the species that did exist. However, birds are considered dinosaurs. Today, there are over 10,000 species of birds that have been discovered.
When was the dinosaurs around?
Non avian dinosaurs appeared during the Carnian stage of the Triassic period about 220 million years ago. They diversified in the Jurassic and even more in the Cretaceous, but they died out 65.5 million years ago. All non avian dinosaurs lived during the Mesozoic era, but birds, which are a group of dinosaurs, continue to exist today.
Did dinosaurs really live?
First, you must define dumb. If you mean IQ, then yes, some dinosaurs were as dumb as birds and others were even dumber too.What do you mean "as dumb as birds." Birds are SOOO smart. But other than that, you're pretty much right.Ecoguru
How did dinosaurs come to exist?
they were from gods imagination . we figure he was like a kid and wanted to see how great his powers were so he made them and realized that they were not what he wanted and created a meteor to destroy them
In general how does biodiversity vary across the biosphere?
Biodiversity can change by mass distinction, natural disasters, hunting through humans and from their predators, Diseases, and etc. For example, existance of dinosaurs have changed since they are extinct. That proves that biodiversity has changed since dinosaurs no longer exist.
How are dragons and dinosaurs different?
Dinosaurs existed. We're not too sure if dragons did. In other words, Dragons exist in the "mind" Dinosaurs exist in the museums. Dragons also exist in literature and in scuplture. Not all dinosaurs are extinct.
Is dinosaurs exist today?
No!
How do dinosaurs exist?
by a meteor
Did dinosaurs exist when people did?
No
What era did dinosaurs begin to exist?
in the era of awesomeness when dinosaurs were alive.
Can dinosaurs exist in present day?
No
Did dinosaurs exist when cavemen came?
No.
Did piranahs exist when dinosaurs did?
no, but their ancestors did!
Do dinosaurs still exist?
No. They are extinct.
In which era did dinosaurs begin to exist?
Dinosaurs first appeared in the early Mesozoic.
Do dinosaurs still exist on this planet?
Yes. Birds are descended from theropod dinosaurs.
Do dinosaurs rule the earth?
Yes because when we are not exist yet dinosaurs rule the earth but today there are no dinosaurs here.
