New recordings are the result of a project between Yellowstone National Park and the Acoustic Atlas

Release of the video came as four occupiers remaining at the Malheur National Wildlife Refuge refused to leave

Casey Heavyrunner was originally charged with felony burglary and evidence tampering

The Exxon refinery gets electricity from two NorthWestern Energy substations

Eight occupiers were arrested, including group leader Ammon Bundy

Announcement leaves Greg Gianforte, Mark Perea as only Republicans seeking to unseat Gov. Steve Bullock

While Trump has threatened to skip debates in the past and not gone through with the threat

Space Shuttle explosion 30 years ago this week killed New Hampshire teacher

Republican made his bid for another term official on Tuesday

Former field services administrator said overburdened workers, high turnover are part of the problem

Rulings on Tuesday name two candidates and college Democrats at Montana State University

Darren Johnson died Jan. 19 while assisting two graduate students with avalanche research in Gallatin National Forest

The company's state taxes increased after it bought 11 hydroelectric dams from PPL Montana for $900 million

Now 73, Kaczynski is imprisoned at the Federal Correctional Complex in Florence, Colorado, known as Supermax

Albert Pedro Jaquez pleaded guilty to felony conspiracy to distribute a controlled substance