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[ 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.
Google PR
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.
Google PR
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.
Google PR
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.
