Puzzling Fossils in a Frozen Wasteland
20.1 The Fossil Record: A Guide to the Past
20.2 The History of Life on Earth
20.3 The Effects of Plate Tectonics
20.4 Mass Extinctions: Worldwide Losses of Species
20.5 Adaptive Radiations: Increases in the Diversity of Life
20.6 The Origin and Adaptive Radiation of Mammals
20.7 Human Evolution
When Antarctica Was Green
Biology in the News: Maybe Those Frog Teeth Weren’t Useless After All
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