Google released following new features: Live from Mars, Historical Maps, and Guided Tours for Mars in Google Earth. Also included 3D models of NASA rovers and, if you follow their tracks, the 360-degree panoramic photos they captured from the surface. Just like browsing on Earth, you can use the search box to locate famous sites like the face on Mars. To enter Mars in Google Earth, click the planets button in the main toolbar and select 'Mars':

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