Google Inc. today announced the launch of ocean in Google Earth, a new feature that 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, a feature that enables users to virtually travel back in time through archival satellite and aerial imagery, Touring, which makes it simple to create a narrated tour in Google Earth and share it with the world and Google Mars 3D, which features hi-res imagery and terrain of the red planet.