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.
Salazar Announces National Park Fee Free Days for 2011
Office of the Secretary
Encourages All Americans to Visit a Park this Year
Last edited 4/25/2016
WASHINGTON – Secretary of the Interior Ken Salazar today announced that the National Park Service will waive admission fees on 17 selected dates throughout 2011 and encouraged all Americans to make a New Year's resolution to visit a national park this year.
“Many people have made resolutions to spend more quality time with loved ones and to get outdoors and unplug in 2011,” said Secretary Salazar. “There's no better place than a national park to help keep those resolutions. Parks offer superb recreational opportunities, making them perfect places to enjoy our beautiful land, history and culture, and nurture a healthy lifestyle.”
Salazar noted that with 394 national parks throughout the country, most Americans live within a few hours of a park, making them places for easy and affordable vacations any time of the year.
“In these tough economic times, our fee-free days will give families many opportunities to enjoy our nation's heritage and natural beauty in meaningful and affordable ways,” he said.
The 2011 fee-free dates will be the weekend of Martin Luther King, Jr. Day (January 15-17), National Park Week (April 16-24), the first day of summer (June 21), National Public Lands Day (September 24), and the weekend of Veterans Day (November 11-13).
The first fee free days are centered on the Martin Luther King, Jr. holiday.
“Visitors can literally walk in Dr. King's footsteps at national parks such as Martin Luther King, Jr. National Historic Site in Georgia, Selma to Montgomery National Historic Trail in Alabama, or the Lincoln Memorial in Washington, DC,” said National Park Service Director Jonathan Jarvis. “They are just a few of the dozens of national parks which trace the history of African Americans.”
“Several parks will also honor Dr. King by hosting volunteer projects for the Martin Luther King, Jr. Day of Service on January 17,” added Jarvis. “It is the only federal holiday observed as a national day of service – a day on, not a day off.”