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The Cretaceous-Tertiary extinction event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaurs' food supply.

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13y ago
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7y ago

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Dinosaurs lived on Earth for over 160 million years, from the late Triassic period (about 230 million years ago) until the end of the Cretaceous period (about 65 million years ago). At the end of the Cretaceous an extinction event caused the death of most dinosaur species. Only birds, which evolved from theropod dinosaurs during the Jurassic period, survived until the present day.

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11y ago

Around 65 million years ago, at the end of the Cretaceous period.

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11y ago

On the order of 130 million years - if you don't include the extra 65 million that their direct descendants (birds) have been around.



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12y ago

At the end of the Cretaceous Period, around 65 million years ago.

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12y ago

about 65 million years ago

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11y ago

Dinosaurs died 65 million years ago.

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11y ago

They aren't extict. Birds are dinosaurs.

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Q: How many millions of years ago did dinosaurs become extinct?
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A sentence with word extinct?

Dinosaurs are now extinct. There are many species of birds that are extinct.


Is all dinosaurs exstint?

Yes, all dinosaurs are extinct. They all went extinct millions of years ago. The exact cause of why they all went extinct is debated by scientist and anthropologist.


Were dinosaurs extinct in the 19th century?

Dinosaurs became extinct millions of years ago. Dinosaurs died off long before humans came into existence.


Where have the gigantic dinosaurs gone?

They all died millions of years ago and are now extinct.


Did dinosaurs become extinct AD or BC?

B.CAnswer:Although the majority of dinosaurs died out about 70 million years ago, the present day birds are evolved from theropods and are direct descendants of the dinosaurs. In that manner dinosaurs have not become extinct.


When did the dinosaur's become extinct?

Non avian dinosaurs became extinct 65.5 million years ago, at the end of the Cretaceous. However, birds are considered dinosaurs. Because birds still exist, dinosaurs are not completely extinct.


Use Must Have Been in a sentence?

There must have been an extremely good reason for all of the dinosaurs to have suddenly become extinct about sixty-five millions years ago.


Did dinosaurs hunt and eat humans?

No, because all dinosaurs except birds went extinct millions of years before humans existed.


What period did dinosaurs become extinct?

around 6.5 billion years ago


Where can a live dinosaur be bought?

You cannot buy living dinosaurs. Dinosaurs died out, as in, went extinct millions of years ago...before man kind.


Were real dinosours used in the movie Jurassic Park?

No, on account of the fact that dinosaurs have been extinct for millions of years.


How long ago did australopithecines become extinct?

Millions of years ago .