EarthDesk replaces the static desktop with an image of the Earth showing current sun, moon and city illumination, as well as real-time global cloud coverage, allowing users to track hurricanes and other weather systems on their Macintosh or Windows desktop. EarthDesk 4.2 adds an option to allow use as a screen saver only rather than strictly a desktop, and is fully compatible with both Leopard and Tiger

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	www.applelinks.com/index.php/more/earthdesk_42_adds_screen_saver_option/