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.
USGS -- Assessing the Effects of Seismic Experiments on Marine Wildlife
As part of a long-standing Cooperative Research and Development Agreement, USGS through its Earthquake Hazards Program, and the Pacific Gas and Electric Company (PG&E), a publicly owned utility providing service within California, are engaged in a long-term seismic risk management program to reduce the impact of future earthquakes. A spin-off from this CRADA is a study by the USGS Western Ecological Research Center to improve understanding of the ecological impact of high energy seismic studies on sea otter population. Sea otters are a federally-listed threatened species that also serve as crucial indicators of the health of nearshore waters and coastal resources, from kelp forests to fisheries. Results from this study will help managers in shaping recovery strategies for sea otters, and for enhancing ecological services provided by nearshore healthy ecosystems. The study involves collaboration between USGS, California Department of Fish and Wildlife, the Monterey Bay Aquarium, and veterinarians and scientists from a number of universities. The team of biologists, veterinarians, technicians, interns and volunteers have captured, tagged and collected tissue samples for health analyses from over 50 sea otters in the region, and then monitored these animals in the wild on a daily basis using radio telemetry and direct observation. Gene transcription analysis is used to assess exposure to various stressors, and advanced bio-logging devices provide detailed information on dive behavior and metabolic rates. Data from thousands of observations of tagged animals are used to provide baseline data on the demography, behavior, diet, habitat use and movements of sea otters in the vicinity of Diablo Canyon Power Plant, for use in “before/during/after” comparison studies that would be conducted in the event of any future seismic testing/research activity.