See also
  • Awesome Reptiles
    Through the ages, discoveries of unusually large teeth and bones buried in the ground led to all kin..
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  • Fossils
    How did those creatures become fossils? When bones are buried by silt and mud, minerals seep into bo..
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  • Rocks & Minerals
    The Natural History department owns a unique collection of some of the rarest and most important roc..
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When did they exist?


Dinosaurs appeared on the scene at the end of the Triassic period, some time after the Permo-Triassic mass extinctions that marked the end of the Paleozoic era about 250 MYA(million years ago).Dinosaurs thrived during much of the Mesozoic era for about 160 million years and during that time they were the dominant type of land creatures.