Google Earth 5.0 has 2 new features. The first allows you to go back in time. You can go back in time to compare historical imagery of buildings, and you can compare historical photos of environmental features. observing changes to the landscape of our planet. The former will be of interest to history teachers, and the latter to science teachers who will be able to use Google Earth to show students how climate change is affecting the Earth’s surface. What better way of learning than seeing for yourself.
This new application opens up exciting possibilities. When you click on the clock icon in the Google Earth 5.0 toolbar, the historical imagery time slider will appear and allow you to change your view to older imagery.
The Google Earth blog explains its exploration underwater:
But starting today we have a much more detailed bathymetric map (the ocean floor), so you can actually drop below the surface and explore the nooks and crannies of the seafloor in 3D. While you’re there you can explore thousands of data points including videos and images of ocean life, details on the best surf spots, logs of real ocean expeditions, and much more.