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: Salazar Designates National Water Trails in Alabama, Georgia and Missouri
WASHINGTON -- Secretary of the Interior Ken Salazar today designated three National Water Trails in Alabama, Georgia and Missouri, committing to work with state and local partners to increase water-based outdoor recreation, encourage community stewardship, and promote tourism that fuels local economies.
“Restoring our nation's rivers and expanding outdoor recreational activities on them is one of the major goals of President Obama's America's Great Outdoors Initiative,” Salazar said. “Through a national network of National Water Trails, we are not only connecting people to the outdoors and supporting conservation efforts for our scenic rivers, but also supporting tourism and the recreation economy in nearby communities.”
The three new National Water Trails include:
The Alabama Scenic River Trail: The water trail begins at the point where the Coosa River enters Alabama just northeast of Cedar Bluff, and continues down the Coosa River to its confluence with the Tallapoosa near Wetumpka. From this conjunction, the trail follows the Alabama River to its junction with the Tombigbee/Warrior system just north of Mobile. It then proceeds through the Mobile River and the Tensaw-Mobile delta, along the Tensaw River and its tributaries to Mobile Bay. The trail, managed by the Alabama Scenic River Association, includes beautiful stretches of seven rivers, two creeks and one bay.
Okefenokee Wilderness Canoe Trail: This 120-mile water trail is located in Georgia near the towns of Folkston, Waycross, and Fargo. Managed by the U.S. Fish and Wildlife Service, the trail allows visitors to canoe past alligators, black bears, egrets, sandhill cranes, and many other species in the cypress swamps and open watery "prairies" of the Okefenokee National Wildlife Refuge.
The Mississippi River Water Trail: Great River Water Trail: This 121-mile water trail begins in Saverton, Missouri at mile marker 301, and ends at St. Louis, Missouri Riverfront at mile marker 180. The water trail, managed by the U.S. Army Corps of Engineers, is lined with majestic bluffs, steeped in history, features abundant wildlife, and provides plenty of places to stop and relax whether it be a remote island or a river town.
On Saturday, Secretary Salazar was in Kansas with Governor Sam Brownback to designate the Kansas River Trail as a National Water Trail. The 173-mile trail follows the Kansas River, one of the longest prairie rivers in the world. It is managed by the Kansas Department of Wildlife, Parks, and Tourism.
Earlier this year, Salazar established the National Water Trails System as a class of national recreational trails under the National Trails System Act of 1968. The designation acknowledges not only the recreation values of the trails but also the excellent stewardship of the state, local communities and other partners who maintain their natural beauty and integrity.
With the designation, the National Park Service will work with the state and local partners to provide resources and technical expertise to promote the development and recognition of the trail.