The evolution of dinosaurs.

@article{Sereno1999TheEO,
  title={The evolution of dinosaurs.},
  author={Paul C. Sereno},
  journal={Science},
  year={1999},
  volume={284 5423},
  pages={
          2137-47
        }
}
  • P. Sereno
  • Published 25 June 1999
  • Biology, Medicine
  • Science
The ascendancy of dinosaurs on land near the close of the Triassic now appears to have been as accidental and opportunistic as their demise and replacement by therian mammals at the end of the Cretaceous. The dinosaurian radiation, launched by 1-meter-long bipeds, was slower in tempo and more restricted in adaptive scope than that of therian mammals. A notable exception was the evolution of birds from small-bodied predatory dinosaurs, which involved a dramatic decrease in body size. Recurring… 
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