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Introduction to the Mesozoic Era

https://ucmp.berkeley.edu/mesozoic/mesozoic.html

“The Mesozoic is divided into three time periods: the Triassic (245-208 Million Years Ago), the Jurassic (208-146 Million Years Ago), and the Cretaceous (146-65 Million Years Ago). Mesozoic means "middle animals", and is the time during which the world fauna changed drastically from that which had...” (from the page’s text)

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