It's been relatively quiet so far this winter on the front lines of the battle over Yellowstone National Park's bison and their migratory desires. While various groups continue to search for a long-standing solution to this dilemma, some researchers at the University of California, Santa Cruz, believe they have the most cost-effective answer.

Thanks to APS, Arizona’s major power utility, solar panels will be supplying about 30% of the electrical power for the Grand Canyon’s South Rim Visitor Center by March. APS considers this a wide investment, since the project will show millions of park visitors that Arizona takes solar energy very seriously.

Some deadly diseases you’ve never heard of lurk in our national parks. It's extremely unlikely that you'll ever be infected, but the odds are not zero. And if you are among of the unfortunate few, may the Good Lord have mercy on you.

Muir Woods National Monument, which celebrates its 101st anniversary today, is swarmed by visitors who admire the giant redwoods but pay little heed to the ecosystem’s lesser publicized features. A profusion of life surrounds those big trees, interacts with them, and participates with them in the intricate processes of energy flow and matter recycling that sustain the ecosystem.