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.
Despite Economic Downturn, Americans and Foreign Visitors Flocked to Our National Parks in 2009
Last edited 4/25/2016
WASHINGTON, D.C. – Ten million more Americans and foreign tourists visited the nation's national parks last year than in 2008, a 3.9 percent increase that marked the fifth busiest year ever for the National Park System, Secretary of the Interior Ken Salazar announced today.
“People both here and abroad know that our national parks are America's best idea, even during an economic downturn,” Salazar said. “Our national parks are treasures that tell the story of our country and celebrate its beauty and culture, and they provide vacation bargains for families living on a tight budget. They offer priceless opportunities to inspire adults and children alike with our wonderful natural, cultural and historic heritage.”
“In an increasingly sedentary society, our parks give parents a place to connect their children with nature and learn to appreciate the good feelings that come from healthy green exercise,” he said.
More than 285 million people visited national parks and other units of the National Park System during 2009, up from just under 275 million in 2008. This fell just short of the all-time visitation record of 287.2 million in 1987.
Possible reasons for the increase in visitation include three weekends last summer when the Park Service waived entrance fees, the visits by President Obama and his family to Yellowstone and the Grand Canyon, the publicity generated by Ken Burns' documentary on the history of the national parks, a decline in gasoline prices, and the continued strong exchange rate the Euro enjoys against the dollar.
Salazar highlighted the benefits national parks provide to our economy. A study released today revealed that the National Park System supports more than 223,000 jobs and nearly $14 billion in economic activity across the country.
Great Smoky Mountain National Park continued its reign as the most-visited national park in 2009, attracting 9.4 million visitors, while the Blue Ridge Parkway was the most visited unit of the system with nearly 16 million visitors.
The top 10 most visited national parks were:
Great Smoky Mountains National Park, 9,491,437 visitors