0
Well, natural selection might be one answer. Environmental conditions cannot expect to remain unchanged, and the dino's were naturally unable to adapt to the dramatic change.
The things that survived the change were notably, the things that were able to hibernate, such as the reptiles and their cousins; and most of the fish and sharks. These were able to survive the immediate temperature changes, which may have been severe, and even may have been able to take advantage of the death of other species.
There had been an earlier extinction event known as the Permian-Triassic in which 96% of all marine species became extinct, and 70% of terrestrial. Including perhaps 100% of insect species. This was the most severe event we believe.
There have been perhaps ten major extinction events, and geological boundaries are often defined by these punctuations.
You could browse 'Mass Extinction' in your favorite encyclopedia.
What else can I help you with?
How long have dinosaurs been on earth?
350 million years
How many years did the dinisors livE AGO?
Dinosaurs lived between approximately 230 million and 65 million years ago, during the Mesozoic Era, which is divided into the Triassic, Jurassic, and Cretaceous periods. The last dinosaurs disappeared around 65 million years ago, likely due to a mass extinction event. This means that dinosaurs roamed the Earth for about 165 million years before their extinction.
Did dinosaurs live two billion years ago?
No, vertebra life has not existed for more than half a billion to a billion years ago. Dinosaurs first appeared about 230 million years ago and died out 65.5 million years ago.
What century the dinosaurs roamed the earth?
Dinosaurs did not roam the Earth in a "century" but from from roughly 250 million (Triassic Period) to 50 million (Cenozoic Era) years ago. A meteor hitting the Yucatan peninsula, about 60-70 million years ago, is theorized to have caused such global destruction immediately, and changed the climate so radically over the following millennia, that dinosaurs were eventually wiped out of the gene pool of the world. Dinosaurs roamed the earth for around 180 Million years. They first appeared during the begining of the Mezoic Era, approximately 240 million years ago, and were wiped out at the end of Mezoic Era, approximately 75 million years ago, although some modern speicies may be descendants of dinosaurs.
Why did mammals flourish beginning 65 million years ago?
Dinosaurs went extinct.
How many years ago were dinosaurs alive?
Dinosaurs were extinct 65 million years ago. Dinosaurs were on Earth for 180 million years, but dinosaurs are still here but as birds.
Where dinosaurs real years and years ago?
Yes 185-65 million years ago the dinosaurs existed. So yes, 65 million years ago the dinosaurs were real.
Why did cavemen never seen dinosaurs?
Early man was 65 million years after the era of dinosaurs.
How many years ago did dinosaurs roam?
dinosaurs roamed the earth about 65 million years ago.
How many years longer have dinosaurs lived on earth than humans?
Dinosaurs - about 150 million years. Humans - about 1 million years.
When were dinosaurs here?
The dinosaurs came onto earth approximately 245 million years ago. They became extinct about 65 million years ago.
Did dinosaur roamed the earth for appoximately 165 million years?
Dinosaurs existed from 231 million to 65 million years ago. So, yes, dinosaurs existed for 166 million years.
Which comes first dinosaurs or monkeys?
Dinosaurs did. The first dinosaurs appeared about 230 million years ago. Monkeys emerged in the past 50 million years or so.
When did dinosaurs lived?
dinosaurs lived for about 250 million years ago.
How many millions of years were the dinosaurs present?
about 65 million years ago was the last of the dinosaurs
What is the total amount of time that the dinosaurs lived on earth?
the dinosaurs lived from 250 million years ago to 65 million years ago.
What period do dinosaurs dominated the land?
Dinosaurs dominated the land from 200 Million Years Ago to about 66-66 Million Years Ago.
