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Friday, 5 August 2011

Dinosaur Over Manhattan


Dinosaurs (from Greek: δεινός terrible or potent, and σαύρα lizard) are a diverse group of animals that were the dominant terrestrial vertebratesfor over 160 million years, from the late Triassic period (about 230 million years ago) until the end of the Cretaceous (about 65 million years ago), when the Cretaceous–Paleogene extinction event led to the extinction of most dinosaur species at the close of the Mesozoic era.


Thefossil record indicates that birds evolved within theropod dinosaurs during the Jurassic period. Some of them survived the Cretaceous–Paleogene extinction event, including the ancestors of all modern birds. Consequently, in modern classification systems, birds are considered a type of dinosaur—the only group of which that has survived to the present day. ( Wikipedia )


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