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.
America's Great Outdoors: Secretary Salazar Addresses National Bike Summit
Office of the Secretary
Secretary Salazar addresses the National Bike Summit. DOI Photo by Tami A. Heilemann
Secretary Salazar delivered the keynote addresses at the 2011 National Bike Summit. DOI Photo by Tami A. Heilemann
Secretary Salazar stands with Mike Van Abel, Executive Director of the International Mountain Bicycling Association. DOI Photo by Tami A. Heilemann
Andy Clarke, president of the League of American Bicyclists, with Secretary Salazar. DOI Photo by Tami A. Heilemann
Interior Secretary Ken Salazar addresses the 2011 Bike Summit. DOI Photo by Tami A. Heilemann
Last edited 4/26/2016
Secretary of the Interior Ken Salazar delivered the keynote at the 2011 National Bike Summit in Washington, D.C. Hosted by the League of American Bicyclists (LAB) with support from the International Mountain Bicycling Association (IMBA), the annual four-day summit attracts more than 800 cyclists who come together to promote bicycle-friendly legislation.
This year's theme, “Acting on a Simple Solution,” emphasizes the importance of reconnecting Americans to the great outdoors by improving access to our public lands, a key objective in President Obama's America's Great Outdoors Initiative.