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 Designates “Walkway Over the Hudson” As New National Recreation Trail
Last edited 4/25/2016
WASHINGTON — Secretary of the Interior Ken Salazar today designated the “Walkway Over the Hudson” project on the Hudson River in New York as a National Recreation Trail. The project, which has turned an historic railroad bridge into a scenic biking and pedestrian pathway, will now be part of a national network of scenic, historic, and recreation trails.
“The Hudson River Valley is one of America's most scenic geographic corridors, and this project will allow thousands of people to enjoy its beauty,” Salazar said. “I encourage all New Yorkers and visitors to New York to hike or bike the bridge when the trail opens.”
The new trail, which is scheduled to open October 2, will transform the Poughkeepsie-Highland railroad bridge into a linear park and trailway. It will provide public access to the Hudson River's scenic landscape for pedestrians, hikers, joggers, bicyclists, and people with disabilities as well as connect to an extensive network of rail-trails, parks and communities on both sides of the river.
“The project's use of a noted historic structure for public recreation will make it an integral part of the National Trails System and provide an excellent opportunity to commemorate the 400th anniversary of Henry Hudson's exploration of the valley,” Salazar said.
The National Trails System, created by law in 1968, provides for outdoor recreation needs, promotes the enjoyment, appreciation, and preservation of open-air, outdoor areas and historic resources, and encourages public access and citizen involvement.
The Trails System consists of 11 national scenic trails, 19 national historic trails, and almost 2,000 national recreation trails, with a total length of more than 63,000 miles.