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 Jewell and Flight 93 Families President Gordon Felt honor the heroes of Flight 93. Photo Credit: Tami A. Heilemann
Gordon Felt speaks to Secretary Jewell about the names engraved on the Flight 93 National Memorial's wall. Photo Credit: Tami A. Heilemann
Flight 93 National Memorial Superintendent Jeff Reinbold speaks with Secretary Jewell about the Memorial. Photo Credit: Tami A. Heilemann
Secretary Jewell, Superintendent Jeff Reinbold, and National Park Service Employees Photo Credit: Tami A. Heilemann
National Park Service employees, family members, and volunteers, with Secretary Jewell carry lanterns into the Flight 93 National Memorial. Photo Credit: Tami A. Heilemann
On September 11, 2013 Secretary Jewell joined Jeff Reinbold, Flight 93 Families President Gordon Felt, DR. Brent Glass, Flight 93 Advisory Board Commissioner and National Park Service employees, volunteers and families in honoring the 40 passengers and crew of United Flight 93 and all those who lost their lives on September 11th.
The observance of Flight 93 and September 11th took place at the Flight 93 National Memorial. The memorial in Shanksville, PA includes a memorial plaza and wall of names, a ring road that encircles the Field of Honor, and a visitor contact station.