Cretaceous (since about 65 million years). Disappeared most of the types and species of dinosaurs during the extinction event of the Cretaceous period - triple , and scientists believed for a long time they did not leave behind any percentages , but that assumption proved wrong , where researchers discovered later that birds are the closest relatives of dinosaurs remaining in the current era , and so through the back of fossils linking Alosnovin , where it was found that all the birds today descend from a common ancestor evolved from dinosaurs Altherobodah during the Jurassic period . Well, most modern classifications put the bird as a survivor of the rank of the dinosaurs. [ 2 ] [3]
Is considered one of the most dinosaur groups of the animal kingdom forms ; Vsliltha of birds more diverse vertebrates on earth , where there are more than 9,000 species. [4] scientists were able to identify the old neighborhoods of more than 500 sex [ 5 ] and 1,000 different kind of dinosaurs non avium , [6] and today can be found on the various forms of dinosaurs in all continents of the world , both live actress birds , or dead know by Mstgesadtha . [7] , the number of dinosaurs Ashba and others had to Ahma , and the types of them went Qaúmteha hind , while the other walked on four types of lists , and was able to move some of them using the two methods . Developed many of the non- avian dinosaurs extensions external skeleton formed a shield physically or gasket skeleton or centuries , has achieved some factions international fame because of unusual shape as perceived by the outside scientists . Avian dinosaurs dominated the atmosphere of the planet since the extinction of the winged reptiles that were considered essential rival and the main reason that inhibits development. Famous dinosaurs by the huge size of some species , which are born with the general idea that all of these animals was a giant , but it is in fact the most dinosaurs were human -sized or even smaller . Most of the known species of dinosaurs that had been building nests in which to lay their eggs until hatching and embraced .
Become skeletons of dinosaurs displayed in museums around the world constitute the important tourist attractions , since he discovered the first fossil of a dinosaur in the early nineteenth century , and turned these animals to a symbol of global and local culture of some countries . Depicted dinosaurs in a lot of novels and movies that have achieved Nhaja great and the proportion of sales is enormous, such as a series of " Jurassic Park " (in English : Jurassic Park), as well as any new discovery of great importance is covered by various media and offer to the public cares about these things