Learn about the characteristics that define each eon, how the Earth's crust and atmosphere were formed, what the Earth's physical processes are, and how a rock's age is determined. More Information » Site Details | Report This Site Web Address » http://www.nmnh.si.edu/paleo/geotime |
This website includes a geologic time table that denotes when dinosaurs existed, and may be downloaded as an Excel worksheet. More Information » Site Details | Report This Site Web Address » http://www.dinosauria.com/dml/history.htm |
Mammals appear first in the late Triassic, at about the same time as dinosaurs. Throughout the Mesozoic, most mammals were small, fed on insects and lead a nocturnal life, whereas dinosaurs were the dominant forms of life on land ... More Information » Site Details | Report This Site Web Address » http://www.paleocene-mammals.de/ |
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