Stuck in Yellowstone with a view: Tourists let bison herd pass A group of snowmobilers had to halt to let a herd of bison pass by at the Yellowstone National Park. Yellowstone visitors got to see a striking new thermal vent late last year — and it may make a return appearance. ... read full story
"geologically speaking, things are always changing at Yellowstone — especially in the hydrothermal areas. It's simply the nature of the complex hydrothermal system that overlies one of the planet's largest magma reservoirs."