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 Salazar Announces Transfer of Historic Lighthouse to the City of Chicago
Last edited 4/25/2016
WASHINGTON, D.C. – Secretary of the Interior Ken Salazar today initiated the transfer of the Chicago Harbor Lighthouse, a beacon that has been a symbol of the Windy City for more than a century, from the U.S. Coast Guard to the City of Chicago.
“The Chicago Harbor Lighthouse reflects the proud heritage of Chicago and the pivotal role the city played in our nation's maritime history, connecting the Great Lakes to the East Coast and ultimately to the Gulf Coast,” Salazar said. “By transferring ownership of the lighthouse to the city, we are guaranteeing that this historic Chicago landmark will be preserved and open to the public for generations to come.”
Salazar authorized the transfer of the lighthouse to the city under the National Historic Lighthouse Preservation Act of 2000, which allows transfer of historic lighthouses from the Coast Guard to whatever federal, state and local agencies; nonprofits; or economic development organizations can best protect them. To date, 46 historic lighthouses of some 300 historic lighthouses nationwide have been transferred under the Act.
The Chicago Harbor Lighthouse is the only surviving lighthouse in Chicago and one of only two remaining lighthouses in the Illinois portion of Lake Michigan.
Originally constructed in 1893 in time for the Chicago World's Fair, the lighthouse was moved to is present location in 1917 when the harbor's breakwater was renovated. At that time, an attached fog-signal room and boathouse were constructed.
The 48-foot-high lighthouse played such a significant role in the development of Chicago that it is commemorated in a relief sculpture, entitled "The Spirit of the Waters," located near the LaSalle Street entrance of City Hall.
In 1984 the lighthouse was listed in the National Register of Historic Places. In 2003, the City of Chicago designated the Chicago Harbor Lighthouse a Chicago Landmark.
The National Historic Lighthouse Preservation Act recognizes the value associated with historic light stations by allowing them to be transferred at no cost to federal agencies, state and local governments, nonprofit corporations, educational agencies, or community development organizations. Entities that receive light stations must make them available for education, park, recreation, cultural, or historic preservation purposes and provide public access.
The City of Chicago, which began the application process in 2005, was the sole applicant for the lighthouse. The Department of the Interior's National Park Service worked with the City to create an acceptable application based on the Acts' review criteria. Under the Act, the General Services Administration will effect the transfer based on the Secretary's determination of the best applicant.