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.
DOINews: National Parks Offering Free Entrance on Sept. 29 - National Public Lands Day
Rocky Mountain National Park is one of the national parks hosting a a National Public Lands Day volunteer event to restore trails, vegetation and campgrounds. Photo of the park's Loch Vale Trail by NPS.
WASHINGTON — All 397 national parks will offer free entrance on Saturday, Sept. 29, for National Public Lands Day. The 19th annual event encourages everyone to get outside and enjoy the great outdoors. Visit www.nps.gov for a list of parks and information to help plan your park adventure.
“National Public Lands Day reminds all of us of the vast and diverse nature of America's open spaces, from small neighborhood parks to large national parks, and the importance of each one,” said National Park Service Director Jonathan B. Jarvis. “We are fortunate that more than 600 million acres of public land, including national parks, provide all of us with cherished places where we can go to unwind, recreate, or learn.”
Many people will lend a hand to help the land and spend part of National Public Lands Day volunteering on work projects. More than 170,000 people are expected to plant trees, clean watersheds, remove invasive plants, replace signs, and otherwise beautify 2,000 public sites throughout the country. Visit www.publiclandsday.org for more information.
Some of the national parks hosting volunteer events are Cuyahoga Valley National Park in Ohio, Fort Pulaski National Monument in Georgia, San Juan National Historic Site in Puerto Rico, Rocky Mountain National Park in Colorado, and Prince William Forest Park in Virginia. Anyone who volunteers for a National Park Service work project will receive a coupon good for future entrance to a national park.
Other federal agencies offering free admittance on Sept. 29 include the U.S. Fish and Wildlife Service, the Bureau of Land Management, the Bureau of Reclamation, the U.S. Army Corps of Engineers, and the USDA Forest Service.
Normally, 133 national parks charge entrance fees ranging from $3 to $25. The other 264 parks do not charge for admission. The National Park Service will also waive entrance fees from Nov. 10-12 in commemoration of Veterans Day.