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Geologic Time Home : Science : The Earth : Geology : Geologic Time Geologic Time Listings Comprehending Geological Time [ Teens/Mature Teens ] - An interactive tool to calculate time periods and human history in terms of different measurement scales such as a meter, a day or a million years. Earth Floor: Geologic Time [ Teens/Mature Teens ] - Explains how the age of the earth is divided up into periods of time, and provides simple definitions and illustrations of the different names. Geological Time Line [ Teens/Mature Teens ] - A simple chart provides links to further details of each era, and an interactive feature allows users to see global shifts and milestones. Life Through Geologic Time [ Kids/Teens/Mature Teens ] - A pictorial history of life on Earth, with events and fossils linked from the relevant period or epoch.

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