Nicolas Brulliard

How a bit of Dry Tortugas National Park ended up 4,500 miles away in Brittany.

Switzerland conveys millions of hikers to alpine landscapes on trains, buses and gondolas. Is a Swiss-like transportation network the solution to overcrowding in U.S. national parks?

Dung beetles perform invaluable ecological and janitorial services, but their influence has long been overlooked. In Great Smoky Mountains, researchers are finally giving much-deserved attention to the mighty insects.

For more than four decades, Jill Baron has studied the changes to the air and water quality of a small corner of Rocky Mountain National Park, and her research exposed one of the biggest threats to the park’s alpine ecosystems.

The Big Bend gambusia were down to three fish. A difficult — but remarkable — recovery ensued.

Researchers are detecting traces of human waste in some of the national parks’ most remote lakes and streams.

A decade ago, a flawed exhibit about the Sand Creek massacre of Cheyenne and Arapaho angered the Tribes. This time, the museum took pains to get the story right.

Five decades ago, they spent their summers working at Yellowstone National Park’s Old Faithful Inn. The experience transformed them — and bonded them for life.

How black bears crossed an international border and miles of desert to recolonize Texas’ Big Bend National Park.

A major school desegregation victory in Colorado was all but forgotten. A century later, it’s getting its due.