Then and Now: Repeat Photography Captures Changing Landscapes

For 50 years, the U.S. Geological Survey has been building an archive old photos of desert landscapes and revisiting the sites to take new photos. The result is the largest collection of repeat photography in the world.

Then and Now: Repeat Photography Captures Changing Landscapes

Backlink: http://www.wired.com/wiredscience/2010/12/usgs-repeat-photography/