U.S. Geological Survey Repeat Photography

Came across an interesting, apolitical, article today on the repeat photography of the U.S. Geological Survey

"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."


Examples:

Hidden Lake Circa 1930, TJ Hilemen

Hidden Lake Circa 2009, Lisa McKeon

View the Wired acticle here (source)
View USGS article here
USGS Repeat Photography Website