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.
Monday's High-Flow Release from Glen Canyon Dam to Benefit Grand Canyon While Continuing Water Commitments
Last edited 4/27/2016
PAGE, Ariz– On Monday, Nov. 11, Assistant Secretary of the Interior for Water and Science Anne Castle will join other officials to initiate a high-flow experimental release from Glen Canyon Dam—the second release under the science-based protocol adopted in May 2012 for more frequent high-flow experimental releases on the Colorado River.
Dam managers and resource specialists have determined that the right conditions exist to trigger a high flow that will mobilize the tremendous amount of sediment deposited by the Paria River since late July—nearly 1.5 million metric tons. Using dam operations to create a flood that mimics pre-dam natural flooding in the watershed, the sediment carried and deposited downstream in Grand Canyon National Park will build sandbars that provide key wildlife habitat for animals and fish, create recreational opportunities for the public, and protect archaeological resources.
The high flows will not change the total annual delivery of water from Lake Powell to Lake Mead; they will simply slightly modify the timing of delivery. The available sediment volume is approximately three times greater than it was in the fall of 2012.
For more information on the high-flow experimental release, click here.
WHO: Anne Castle, Assistant Secretary of the Interior for Water and Science
High-Flow Experimental Release from Glen Canyon Dam
Monday, November 11, 2013
10:30a.m. - Arrival for 11 a.m. remarks by Assistant Secretary Castle at visitor center
11:30a.m. - Arrival for security screening and escort to base of dam before bypass release
1 p.m. - Start of bypass release from river outlet tubes
Hayden Visitor Center, Glen Canyon Dam, Page, Arizona
Glen Canyon Dam is a National Critical Infrastructure facility. Notification of special coverage requests must be made prior to the event Members of the Media must RSVP in advance of the event to: Ron Anderson, Glen Canyon Dam Security, (928) 645-0405, email@example.com.