The Umatilla River once served as an important meeting ground for the Cayuse and their Nez Perce allies to the east. A large ...

Grand Staircase-Escalante National ... the visitor center features a topographical relief model of the monument, archaeology exhibits, and a geologic cross section mural. Be sure to ask for maps, ...

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons ...

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object ...