Summer is here and many people from around the world will be visiting America's national parks. The National Park Service expects over 270,000,000 guests at parks every year. Yellowstone National Park is one of the most popular – every year at least 2 million tourists enjoy the park's wildlife and unique geothermal features. Yellowstone was the first American national park and is renowned for its bears, wolves, bison, geysers, and hot springs.
Recovered from “endangered” status, Rocky Mountain wolves are now being hunted. It’s a classic story of human interests versus a competing predator.
Giant Panda 'Kai Kai' sits in his enclosure at the Giant Panda Forest exhibit at the River Safari, Nov. 28, 2012, in Singapore. Panda populations are threatened by poaching and a loss of habitat, as well as a low birth rate.
It's also a chance for the president to see how national parks - likened to Europe's cathedrals - need political and fiscal support.
The president visited the senator's home state Friday, even as Baucus works to get GOP support for healthcare reform. Both men are being blasted from the left and the right.
Man-made islands can remove ammonia, heavy metals, and other chemicals from the water.
For them, 'volcano monitoring' is no punch line; it's an important part of keeping Alaska safe.
Thriving forest pests and melting glaciers may make parks a warning system for climate change effects.
Acoustic ecologist Gordon Hempton says natural sounds are disappearing.