The Grand Canyon is vast, covering 1,218,375 acres and 1,904 square miles across Arizona. Here's what to know.

Here's what's open and closed at Grand Canyon North Rim, South Rim and Phantom Ranch in the wake of wildfires that destroyed the North Rim lodge.

The Grand Canyon Lodge, now lost to a wildfire, told a key part of history for both the Grand Canyon and the National Park ...

Geology is full of detective stories about the Earth's history, and a new paper in Geology by University of New Mexico ...

The formation of the Grand Canyon may be tied to a meteor strike that created another astonishing Arizona feature hundreds of ...

ANTIOCH — A 10-acre fire that broke out in Antioch on Tuesday afternoon prompted a public health advisory for smoke, ...

Atlantic, Hill Country, Texas, central Florida, southern Arizona, and the Upper Midwest are at risk for more flooding ...

Holly Bock reports on how a new satellite system delivers critical alerts to hikers deep in Grand Canyon. It works on devices like Garmins & newer iPhone models. Holly Bock reports.

The nearly 13,000-acre wildfire burning in eastern Utah crossed the Colorado border Monday night, joining four other fires ...

World News Live Updates: Russian strikes kill three in Eastern Ukraine amid Trump's peace deal ultimatum ...