D.Lee Beard presents a basic introductory tutorial in how to use the Google Earth application which is available for Mac OS X and Windows. He explains how to download it for free, navigate within it, view different layers, and how to change viewing angles to see terrain. He also explains how to use Google Earth to view historical maps and aerial photographs of various locations plus a complete globe overlay for an historical map view. (11min 32sec) Click Here to Download Episode 147