A new version of Google Earth will let users explore the oceans, view images of Mars and watch the Earth's surface change over time.
Users of Google Earth 5.0 can dive beneath the ocean's surface, explore 3D-images of the underwater terrain and view articles and videos about marine science.
The Historical Imagery feature lets users see archive satellite images of a single location over time.
Also Google Mars 3-D features high-resolution images of the Red Planet.
The new features were unveiled on Monday at the California Academy of Sciences in San Francisco, where former Vice President Al Gore was among the speakers.