Dinosaurs

 

Dinosaurs

I have read something interesting today. What is dinosaur? What is it like? Dinosaur is a diverse group of reptile of the clad dinosaurian that first appear during Triassic period. Although the exact origin and timing of the evolution of dinosaurs is the subject of active research the current scientific consensus places their origin between 231 and 243 million years ago they become terrestrial vertebrata after the Triassic-Jurassic extinction event 201 million years ago. Their dominance continued through the Jurassic and cretaceous periods led to the extinction of most dinosaur groups 66 million years ago. The fossils records indicate that birds are modern feathered dinosaur, having evolved from thereupon ancestors during the Jurassic periods. As such birds are the only dinosaur lineage to survive the extinction events. The term of dinosaur is sometimes used generally to refer to the combine group of avian and non-avian dinosaurs. At other times it is used to refer to the non-avian dinosaurs specifically, while the avian dinosaurs are sometimes refer to as birds. This article deal primarily with non-avian dinosaurs. Dinosaurs are a varied group of animals from taxonomic, morphological, and ecological standpoints. Birds at over 10000 living species are the most diverse group of vertebrata besides vermiform fish. Using fossils evidence paleontologists have identified over 500 distinct genera and more than 1000 different species of non avian dinosaurs. Dinosaurs are represented on every continent by both extant species and fossil remains. Through the first half of the 20th century, before birds were recognized to be dinosaur, most of the scientific community believe dinosaur to have been sluggish and cold-blooded.  Most research conducted since the 1970, however, has indicated that all dinosaurs were active animal levitated metabolism and numerous adaptation for social interact action for social. The other is carnivorous. Everyone suggest that egg laying and nest building is additional trait share by all dinosaurs.

 

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