If you haven't guessed it already, I'm a huge National Geographic [1] fan. I've already discussed how you can download the free National Geographic POD [2] that will update your background with a new National Geographic image each day. Well National Geographic has just added more stunning high resolution photography [3] wallpapers to their collection. From adventure and exploration to science and space wallpapers, you can check them all out here [4]. Just click on the one you like, select wallpaper [5], choose the most appropriate size for your desktop screen, add it as your background and voilà—your desktop will instantly look fabulous!