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.
Trustees Open 30-Day Public Comment Period for Draft Restoration Plan for Hayden Mine Complex Sites in Pinal County, Arizona
Last edited 2/14/2017
Aerial view of the Ray Mine site in Pinal County, Arizona. Multiple releases of hazardous substances from this mining site over the past 30 years injured natural resources and natural resource services in nearby Mineral Creek and Gila River. Photo credit: FWS.
On February 8, 2012, the State of Arizona and the Department of the Interior, represented by the Bureau of Land Management and the U.S. Fish and Wildlife Service, opened a 30-day public comment period for the “Draft Restoration Plan/Environmental Assessment for the Hazardous Substance Releases from the Hayden Smelter and Ray Mine Facilities.”
This Draft Restoration Plan/Environmental Assessment proposes a strategy and alternatives for restoring natural resources and natural resource services injured by hazardous substances released from the Ray Mine and the Hayden Smelter sites in Pinal County, Arizona. Collectively, the Ray Mine site and the Hayden Smelter site, located about 25 miles apart along the Gila River in central Arizona, are known as the Hayden Mine Complex. Injured natural resources at the sites include riparian, emergent and aquatic vegetation, aquatic insects and native fishes.
Restoration alternatives in the Draft Restoration Plan/Environmental Assessment are focused on 3 former ASARCO properties, totaling 995 acres, on the lower San Pedro River near the confluence with Aravaipa Creek. These properties along the river were conveyed to the Arizona Game and Fish Commission as part of the settlement with ASARCO L.L.C. for natural resource damage claims at the mining site and smelter. Altogether, the 3 properties comprise 500 acres of riparian habitat, 390 acres of upland habitat and 105 acres of agricultural fields. Under Arizona Game and Fish Department management, these properties will be open to limited hunting and other outdoor recreation, like hiking, nature photography and bird watching.
The deadline for submitting written comments on the Draft Restoration Plan/Environmental Assessment is Friday, March 9, 2012. Written comments received during the open comment period and the trustees' responses to these comments will be summarized in a Final Restoration Plan/Environmental Assessment to be released in the future.