Google has been busy developing the latest version of Google Earth 5.0. This new version features ocean in Google Earth, and enables users of Google Earth to dive beneath the water surface, explore 3D underwater terrain, and browse ocean-related content contributed by leaders in ocean science and advocacy. The new version of Google Earth also introduces Historical Imagery, Touring and Google Mars 3D. With the new version users can dive into the ocean, travel back in time and visit Mars. 

The new addition enables you to dive and visit the deepest part of the ocean, the Mariana Trench, explore the ocean with top marine experts including National Geographic and BBC, learn about ocean observations, climate change, and endangered species, discover new places including surf, dive, and travel hot spots and shipwrecks. You can take a tour at this site.