A newly discovered, raccoon-sized armored monstersaurian from the Grand Staircase-Escalante National Monument in Southern ...

The Justice Department issued a new opinion arguing President Trump can revoke national monument status, the latest step in a ...

An advisory opinion issued Tuesday by the U.S. Department of Justice says protections for land designated as monuments can be ...

Looking for the iconic vistas of Arizona's Horseshoe Bend without the hordes of tourists? Well, this secret spot definitely ...

A fossil found in Utah two decades ago now gives researchers a better understanding of what Utah's ecosystem looked like 76 million years ago.

President Donald Trump’s administration appears poised to rescind some of the national monuments created by past presidents.

Conservation groups gathered to support two national monuments, opposing a plan by the Trump administration to open lands to ...

President Donald Trump has broad authority to revoke protected land designated as national monuments by past presidents, the ...

The department's disavowed a 1938 determination that presidents can't revoke a Antiquities Act designation by a predecessor.