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, Chu to Flip Switch on Energy-Efficient LED Lights on National Mall
65 percent energy savings expected from state-of-the-art lights; Ceremony kicks-off week of energy events for Obama Administration
Last edited 4/27/2016
WASHINGTON, D.C.—Today, Secretary of the Interior Ken Salazar and Secretary of Energy Steven Chu will participate in a lighting ceremony featuring the newly-installed LED lights on the National Mall. Illuminating the Mall from 3rd to 15th Streets, the LED technology is expected to reduce lighting energy by up to 65 percent and provide a well-lit atmosphere to welcome the National Mall's 25 million annual visitors.
“Achieving an economy built on American energy will require an all-of-the-above approach, one that includes safely and responsibly developing our domestic energy resources – and making the most of what we have available through efficiencies,” said Secretary Salazar. “There is no more fitting place to build a model of energy efficiency than right here in America's front yard, the National Mall, with the installation of these LED lights.”
"Using energy efficient LED lightbulbs is an important way Americans can save money by saving energy," said Energy Secretary Steven Chu. "Investing in an American economy that is built to last includes taking advantage of all of America's energy resources while working to improve efficiency. Installing these energy efficient bulbs on the National Mall is an important demonstration of our commitment to partnering with the private sector to promote energy saving technologies."
Salazar and Chu will be joined by Superintendent of the National Mall and Memorials Parks Bob Vogel, President of the Trust for the National Mall Caroline Cunningham, and CEOs from Pepco, OSRAM SYLVANIA, and Siemens who donated the materials and skilled labor for the LED light installation.
Ken Salazar, Secretary of the Interior
Steven Chu, Secretary of Energy
Bob Vogel, Superintendent, National Mall and Memorial Parks
Caroline Cunningham, President, Trust for the National Mall
Eric Spiegel, President and CEO, Siemens Corporation & CEO, U.S. Region
Rick Leaman, President & CEO, OSRAM SYLVANIA
Joseph M. Rigby, Chairman, President and CEO, Pepco Holdings, Inc.
National Mall Lighting Ceremony
Monday, January 30, 2012 @ 5:30 p.m.
National Mall at 14th Street & Madison Drive
Audio mult box will be provided. Parking is on a first-come, first-serve basis.