Keyhole and Google Earth

Downloaded Google Earth yesterday. It's amazing. It makes learning Geography such a pleasure that I've been browsing the earth all the time just like Keyhole says.
What make this a success is:

• High definition digital images captured from sattelite
• KML, or Keyhole Markup Language, is an XML grammar and file format for modeling and storing geographic features such as points, lines, images and polygons for display in the Google Earth Client.

The high definition imagery enables us to clearly see mother earth. There're so many views that are so splendid and not possible to be seen by any means on earth. And KML enables easy communications between Google Earth users. I have to say that this is such a good way of sharing information that real estate companies are adopting it so quick. The Keyhole community provides a lot of information as well as news on the development of this area.