EarthViewer for iPad Takes You Through the History of Earth | iPad Apps for School - 5 views
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John Evans on 02 Feb 14"EarthViewer is a free iPad app that takes you through 4.5 billion years on Earth. EarthViewer allows you to select eons and eras to view. Within each eon and era you can view tectonic plates, continental drift, and other geological events. You can view major biological events in EarthViewer too."