Ranger naturalist George D. Marler meticulously documented changes in hydrothermal activity in the geyser basins of ...

Beryl Spring, located between Mammoth Hot Springs and Madison Junction in Yellowstone National Park, was named for the ...

ABOVE: The popular spot, Grasshopper Glacier in the Beartooths, is virtually gone. After lasting thousands of years, it is disappearing in less than a lifetime. BELOW: Remnants of the once proud ...

The loss of Grasshopper Glacier, north of Cooke City, in the heart of the Greater Yellowstone Ecosystem, is a bellwether, scientists say.