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<!--Need a quick reference to the geologic time scale of Earth's history? Try out our Free geotimescale application on your iPhone or iPod Touch! Find out, for example, when dinosaurs ruled the world or when reptiles first appeared. This is a complete reference for students, educators, professional geologists, or anyone interested in geology. There are two different views featured: Geologic Time Scale and Scale with Ages. Just tap to select the view and then scroll through the time scale. Version 1.1 requires iPhone OS 3.0 or later.-->
Requirements: iPhone or iPod touch (2nd generation), iOS 4.2 or later.
Click the screen to see other views.
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Tasa Graphic Arts, Inc.
geotimescale
geotimescale