US Oil Imports Map
As part of the Google.org Geo Challenge Grants Program the Rocky Mountain Institute (RMI) has created an animated map of US oil imports by country since 1973.
The map animates the supply of oil to the US from other countries and how the imports have changed over the last 35 years. The thicker the line in the map, the more oil produced or imported.
A time-line is shown underneath the map. The time-line is also animated to show the date of the oil supply shown on the map. Beneath the time-line there are also a number of buttons which will set the map and the time-line to specific important dates, such as 'the first oil crisis', 'the second oil 'crisis' and when gas hit $5 a gallon.
Via: Google LatLong: Where does our oil come from? and Google.org Blog