Once they lived, they flourished and at last they gave in to the nature's dictum -- they ceased to exist as losers in the struggle of existence. Nevertheless, they are still so popular that even a few tongue-twisting names of them have become easy going on the vocabulary of the children. In spite of such obsession about the dinosaurs, the two most burning issues that haunt the palaeontologists concern the huge diversity of the group and the causes of the demise of the mighty animals. Till now, a 527 dinosaur genera have been described. A scientific twosome comprising a statistician and a palaeontologist from Pennsylvania, U.S. A took the total number of the skeletons of all the described genera into account and plugged the data in an established mathematical model that limits observed data to unseen genera. And the good news emerged as the estimation figured out that a total of 1850 dinosaur genera should have been there.
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