Researchers at the University of Utah say the most detailed seismic images yet published of the plumbing that feeds the Yellowstone National Park supervolcano is much different than previously thought, showing a plume of hot and molten rock rising at an angle from the northwest at a depth of at least 410 miles, contradicting claims that there is no deep plume, only shallow hot rock moving like slowly boiling soup.

Mother Nature came to the rescue and blanketed parts of Yellowstone National Park with almost two feet of new snow, clearing the way for Park personnel to officially open the Park for the winter season today.

The lack of snow on the western side of Yellowstone National Park has officials scrambling to come up with a game plan for transporting visitors within the Park when the winter season opens Tuesday.

Damage among Yellowstone National Park's crucial white-pine trees is higher than anticipated, according to the Natural Resources Defense Council (NRDC), as beetles wreak havoc on this crucial source of food for the region's grizzlies.

A new policy proposed by the National Park Service would require firms basing commercial products on research conducted in Yellowstone National Park to share the wealth.

Minutes after the Interim Winter Use Rules for Yellowstone National Park were published in the Federal Register, the state of Wyoming and Park County filed suit in federal court opposing the plan, arguing too few snowmobiles will be allowed inside the Park during winter months.

The Roosevelt Lodge area in Yellowstone National Park could see limited expansion and the services at Tower could be reduced under a comprehensive plan adopted by the National Park Service.

Bison who wander outside the boundaries of Yellowstone National Park could not be killed by the National Park Service and the U.S. Forest Service if a lawsuit filed by nine environmental groups and American Indian organizations succeeds.

Not only did the flood of visitors to Yellowstone National Park this past summer set a record, it also helped the Park set a record for total attendance for the year -- and we still have part of the winter season to go.

Yellowstone National Park is using money from the American Recovery and Reinvestment Act to replace a failing wastewater treatment plant at Madison Junction and install 15 new vault toilets in high-use areas across the Park.