Geologists at Yellowstone National Park have pulled more than 300 lost hats from the famous hot springs. The headwear, ...

Rangers attempting to clean the Morning Glory Pool in September 1975.

Park visitors should ‘hold on tight’ to their hats and stay on marked boardwalks and trails to avoid losing their favorite ...

From pizza boxes to stuffed animals, geologists have found unusual trash across Yellowstone National Park this year after ...

Like the hats that fly off people’s heads, most of the trash that ends up in Yellowstone’s hydrothermal areas winds up there ...

A specialized team of scientists says they've collected over 300 hats, amid 13,000 pieces of trash blown into the vast ...

More than 13,000 pieces of garbage have been retrieved this year from hydrothermal areas in Yellowstone so far this year.

Geothermal debris is a more common problem than you might think: Already this year, park staffers have removed more than ...

“Come on, claw machine, work with me,” 7-year-old Evelyn begged, fishing with the claw for a stuffed panda, leopard or koala.

In the fall cleaning campaign, Yellowstone's geology team discovered a trove of unusual items tossed by visitors.