This collection of approximately 4,500 photographs documents natural environments, ecologies, and plant communities in the United States at the end of the nineteenth and the beginning of the twentieth century. Produced...

This portal provides links to an extensive selection of photo and image galleries available on United States Geological Survey (USGS) websites. It features a short list of highlighted sites, such as the Earth Science...

This project, conducted by the United States Geological Survey (USGS), documents changes over time in the landscape of Glacier National Park, particularly the retreat of the park's glaciers. The project involves pairing...