-That dominated terrestrial ecosystems during the Mesozoic about 160 million years.
-One of the main features of the dinosaurs is the property of having legs positioned vertically below the body.
-The geographical distribution of the dinosaurs began in the late Triassic.
-It has been proved that there was a solidly evolutionary transition from certain dinosaurs to birds.
Copied from http://en.wikipedia.org/wiki/Dinosaur
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