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The Dinosauria
Dinosaurs were the dominant terrestrial fauna for 160 million years. They diversified into many different forms, occupying almost every available ecological niche. Today, these creatures are being revived and their secrets uncovered by scientists in an effort to gain a greater understanding of the ancient Earth.
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Ammonites
This quiz is about the ammonites, mollusks which lived during the Paleozoic and Mesozoic eras.
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