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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Written by daspletosaurus Posted Online: Oct 16, 2009 Last Modified: Never
The Cambrian period was an important time in the history of life on Earth. Many strange new creatures evolved and came to dominate the seas during this period.
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