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第 1 页CC0 1.0（公有领域）
Crocodylomorphs, including crocodylians and their extinct relatives, are known from body and trace fossils found in more than a dozen units of the National Park Service. The records range in age from the Late Triassic to the Pleistocene and include type specimens for five species, among them the…
第 10 页CC0 1.0（公有领域）
Interactive 3D Model Collected from Chaco Culture National Historical Park, New Mexico.
第 11 页CC0 1.0（公有领域）
The world of the Ancestral Puebloans, or Anasazi, has been a major research area for archeologists of the Southwest, who have examined the nature and evolution of these prehistoric people from many angles. Emily Brown, a former NPS archeologist, is taking a fresh approach to the Ancestral…
第 18 页CC0 1.0（公有领域）
Interactive 3D Model Collected from Chaco Culture National Historical Park, New Mexico.
