Grand Canyon National Park officials will shut off water service in the inner canyon for a week as crews work on the Transcanyon Waterline and the Havasupai Gardens pumphouse.

High summer temperatures make Flagstaff’s thin air feel even thinner. Density altitude affects your body, turning a simple mountain hike into a tough physical workout.

Health officials in Mohave County say a resident has died from the sin nombre strain of hantavirus.

The estimate pops up again and again in reporting on the West’s most important waterway, but one researcher thinks it might be slightly high. That might point to a bigger problem.

A Conservation K-9 named Blue will help reduce human-wildlife encounters in busy areas of the South Rim in Grand Canyon National Park.

On investigative travels and assignments, author Scott Thybony is no longer surprised by the unexpected questions — and answers — he gets. Thybony remembers some surprising interactions he’s had along the way in this month’s Canyon Commentary.

Frontman Ben Gibbard talks about the band's latest album, I Built You a Tower.

A new twice-yearly HIV prevention injection could transform South Africa's fight against the epidemic — but U.S. aid cuts and limited doses threaten to slow its impact.

U.S. employers added jobs for the third month in a row in May, while the unemployment rate held steady at 4.3%. But wage gains softened and likely failed to keep pace with rising prices.

A link to the highway that cuts travel times from hours to just minutes, and a symbol of a flow of investment that has provided unprecedented access to high-speed internet in this remote region.

The Senate passed a $70 billion immigration enforcement funding bill after an overnight vote. And, former first lady Jill Biden discusses her husband's 2024 campaign with NPR's Newsmakers.