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.
On May 24, 2011, the President issued a Memorandum on Federal Fleet Performance. Section 1 (b) of the Presidential Memorandum requires Agency executive fleets to achieve maximum fuel efficiency, be limited in motor vehicle body and engine size, and ensure optional equipment is limited to what is essential to meet Agency mission requirements. Additionally, the executive fleet vehicles are to be mid-sized or smaller, except where larger sedans are essential to the Agency mission.
The Memorandum requires that within 180 days of the date of issuance, any executive fleet vehicle larger than mid-size sedan, or which does not comply with the requirement of the vehicle(s) being an alternative fueled vehicle, must be disclosed on the Agency website. Executive fleet vehicles are defined as vehicles used primarily to transport Senior Executives (Heads of Agencies, Senior Executive Service (SES) employees, and General Officers).
The Department of the Interior Executive Fleet vehicles are listed below: