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What is a dinosaur ?


? What is a dinosaur 




The Mesozoic Era is the name for the time when dinosaurs dominated the Earth. Lasting for over 180 million years, this enormous era is divided into three time periods called the

Triassic, Jurassic, and Cretaceous. As the climate changed and new types of plants grew, different animals appeared. To describe when

 these periods were we shorten “million years ago” to MYA.

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