Google Earth allows exploration of oceans, Mars

SAN FRANCISCO (AP) - February 2, 2009 The new features on Google's popular geography program were unveiled Monday at the California Academy of Sciences in San Francisco, where former Vice President Al Gore was among the speakers.

Users of Google Earth 5.0 can now dive beneath the ocean's surface, explore three-dimensional 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.

And Google Mars 3-D features high-resolution images of the Red Planet.