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.
65.5 million years ago was when they became extinct and they first evolved about 225 million years ago.
I could be wrong, but I believe it is the Jurassic times and only then.
A Dinosaurs lived for 25000 years
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.
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.
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
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
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.
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.
No!
by a meteor
No
in the era of awesomeness when dinosaurs were alive.
No.
no, but their ancestors did!
No
No. They are extinct.
Dinosaurs first appeared in the early Mesozoic.
Yes. Birds are descended from theropod dinosaurs.
Yes because when we are not exist yet dinosaurs rule the earth but today there are no dinosaurs here.