Google just released a major new update to Google Earth that now includes the rumored maps of the ocean floor. Google unveiled this update at an event at the California Academy of Sciences. After installing the latest version of Google Earth, you will be able to explore the ocean floor in the same way you browse the Earth's surface. Besides mapping the oceans, however, Google has also added three more interesting new features to Google Earth: easier access to historical imagery, the ability to record and narrate fly-through tours with the new 'touring' feature, and a 3D map of Mars.
