NASA has a website called 'Blue Marble', where they post very high resolution images of their Earth observatory,(meaning could be used for publishing), and even some analysis images. I found an interesting set of analysis images wherein you can see how the northern hemisphere of the earth really freezes and defreezes in the winter.. While pictures taken in Jan show lot of snow or white, the consequent months show rise in temperature..
January 2004
April 2004
Cool :o)
More pictures are available here:Blue Mable
If you are the crazy guy like me, click on the small round Earth image (top of this post), to open bigger image...right click on it to set as wallpaper.
