Mercury's surface in "enhanced color," a color scheme created to emphasize color differences. This is not what Mercury would look like to the human eye, but by applying mathematical analysis to images, color differences can be accentuated beyond those visible to a person.
Mount Rushmore National Memorial under construction.
The workers had to endure conditions that varied from blazing hot to bitterly cold and windy. Each day they climbed 700 stairs to the top of the mountain to punch-in on the time clock. Then 3/8 inch thick steel cables lowered them over the front of the 500-foot face of the mountain in a "bosun chair." Despite the dangers, no one was killed during the project.
Otters in Glacier Bay National Park and Preserve, Alaska.
The sea otter population of Glacier Bay has increased dramatically in the past 20 years. Ecologists consider sea otters a keystone species here. Otters consume vast quantities of clams, urchins, crabs, and other invertebrates and their presence creates ripples through the ecosystem. NPS photo.
Every day someone like you becomes a wildland wildfire fighter, a teacher, a trail-builder, a museum curator, or a park ranger. Discover your opportunities in national parks. Come to play. Come to learn. Come to serve. Develop your environmental leadership skills. Find a job. Be the next generation to preserve and protect these great places.
With more than 80% of Americans living in urban areas, urban parks are more important than ever. The father of American landscape architecture, Frederick Law Olmsted, said of urban parks:
It is one great purpose of the Park to supply to the hundreds of thousands of tired workers, who have no opportunity to spend their summers in the country, a specimen of God's handiwork that shall be to them, inexpensively, what a month or two in the White Mountains or the Adirondacks is, at great cost, to those in easier circumstances.
Secretary Jewell and Director Jarvis Announced Nine New National Historic Landmarks Highlighting America's Diverse History and Culture
Office of the Secretary
Looking across #18 Lower green, past #18 Upper green to clubhouse. Facing north. Photo: James Lum, Communications Manager, Baltusrol Golf Club, August 2013.
BROWN BRIDGE. Northeast portal. Photo: Jet Lowe, 2004
DUCK CREEK AQUEDUCT. Perspective view from southwest. Photo: James W. Rosenthal, 2004.
Peary Summer Home, Eagle Island Photo: Brian Vanden Brink, September 2001
East island in lake, looking northwest toward Research volume and water tower. Photo: John M. Evans, March 3, 2012.
Brick House, west façade Photo: Roger Reed, September 2012
Lydia Pinkham House, southeast view. Photo: Roger Reed, September 2012.
General view, main façade of Research Studio, looking north from Packwood Avenue. Photo: Christine M. French, 2013.
Streetcars passing along Carrolton Avenue. Photo: Charles E. Leche, April 2013.
U.S. Secretary of the Interior Sally Jewell and National Park Service Director Jonathan B. Jarvis announced the designation of nine new national historic landmarks, ranging from the oldest operating streetcar system in America to the home of the nation's first female cabinet secretary. The sites announced today join 2,544 other sites across the country recognized as places that possess exceptional value and quality in illustrating or interpreting the heritage of the United States.