Add interactive content to Google Earth.

Google has added interactive content from the Discovery Channel and other providers to popular geospatial software Google Earth.

The overlays can be accessed by clicking a box in the software's sidebar, and support videos, photos, RSS feeds and blogs.

Is every corporate headquarters going to be added? Or can PR practitioners be much much more creative

The Discovery Channel, for example, is offering video segments about landmarks, cities and tourist attractions around the world ..

"Google Earth Featured Content is a way for Google to connect users with really compelling, high-quality information being illustrated and shared on Google Earth," said John Hanke, director of Google Earth and Maps.