Does anyone know how many years ago the dinosaurs became extinct?

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  1. keepitnatural profile image62
    keepitnaturalposted 13 years ago

    Does anyone know how many years ago the dinosaurs became extinct?

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  2. viplove09may profile image61
    viplove09mayposted 13 years ago

    Dinosaurs went extinct about 65 million years ago (at the end of the Cretaceous Period), after living on Earth for about 165 million years. If all of Earth time from the very beginning of the dinosaurs to today were compressed into 365 days (1 calendar year), the dinosaurs appeared January 1 and became extinct the third week of September. (Using this same time scale, the Earth would have formed approximately 18.5 years earlier.) By comparison, people (Homo sapiens) have been on earth only since December 31 (New Year's eve). The dinosaurs' long period of dominance certainly makes them unqualified successes in the history of life on Earth.

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  3. lee custodio profile image62
    lee custodioposted 12 years ago

    There is still no definite explanation as to why dinosaurs disappeared. But scientists have been arguing on several theories on the possibilities of what might have occurred. One thing is for sure, dinosaurs became extinct at the end of the cretaceous period about 65 million years ago and fossils and rock formation is continuously being studied by paleontologists to solve or shed light to this issue.

    Read more at

    http://hubpages.com/hub/Why-Dinosaurs-Became-Extinct

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  4. lone77star profile image73
    lone77starposted 12 years ago

    Well, yes ... 65 Mya.

    But there is some evidence that Homo sapiens may have been around as much as 10.5 Mya. Not exactly walking with the dinosaurs, but there were some pretty scary creatures in the late Miocene epoch.

    The thin layer of debris at the K-T (Cretacious-Terciary) boundary points to a giant meteor impact or several such impacts within a relatively short span of time. For dino and friends, it was "lights out!"

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