Google has released Google Earth 6, with it comes a variety of upgrades and improvements. Most important is Street View is now deeply integrated into Google Earth which allows users to fly from space to whichever street Google has Street View imagery of.
In order to do this, pickup the Pegman icon docked right next to the navigation controls and drop Pegman wherever you see a blue-highlighted road.
With the update comes more historical imagery, which allows a user to see photos of the location in a timeline (from 1945 to present) for those who are interested.
Lastly Google Earth now has 3D trees to make its environment seem more realistic. Google said dozens of species of trees are represented in a number of 3D-modeled parks and public places. Google has added 80 million virtual trees in places like Athens, Berlin, Chicago, New York City, San Francisco, and Tokyo, with more to come.