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provides photos and video clips from this movie about creatures that roamed the seas 82 million years ago. Discover sea monsters of the past and present using the interactive time line. Excavate fossils on a "virtual dig." See a video on how to survive a shark attack. (National Geographic, National Science Foundation)
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The Triassic was a time of transition. Earth's species rebounded from the planet's largest ever mass extinction -- up to 95 percent of all life-forms had perished at the end of the Permian period. Land animals thrived. Reptiles were prominent, and the first dinosaurs and tiny mammals emerged. Near the end of the Triassic's close another extinction event wiped out most marine reptiles and opened the door for dinosaurs to dominate. |
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Xiphactinus |
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