So far this year, the National Park Service geologists at Yellowstone have recuperated over 300 hats from hydrothermal areas.

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

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.

Humans unfortunately tend to litter, even in beautiful and historic places like Yellowstone National Park. While you may suspect plastic water bottles or cigarette butts to be the main offender, it's ...