Public domain Windows Desktop wallpaper from US National Parks

by Mark Kaelin  |  June 26, 2012, 2:53am PDT  |  Image 3 of 55

Agate Fossil Beds National Monument - Nebraska

During the 1890s, scientists rediscovered what the Lakota Sioux already knew - bones preserved in one of the most complete Miocene mammal sites in the world.

Photo credit to National Park Service

Agate Fossil Beds National Monument - Nebraska - Image 3 of 55

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