Researchers say decades of dry, hot conditions have killed pinyon pine and juniper forests across the West.

Though the price of gas at the pump is falling, it’s still roughly $1 higher in Arizona than it was a year ago, due in part to the war with Iran. That’s putting a squeeze on the river rafting economy.

The Tohono O'odham Nation wants a federal judge to immediately halt pending plans by the Department of Homeland Security to build 62 miles of border wall through the reservation.

The Coppermine Chapter voted overwhelmingly to adopt a resolution opposing mining projects like the kind Essential Minerals wants to build.

Land managers say a fire burning near the Utah-Arizona state line has grown to more than 2,200 acres and is now 5% contained.

The Forest Service says it's fully staffed with seasonal firefighters going into summer but there are still questions about whether the government is prepared if major wildfires get out of hand.

President Trump's beautification project of the Lincoln Memorial Reflecting Pool has become plagued with a robust algae bloom, despite a $14 million investment and a coating of "American flag blue."

Loons, beloved American waterbirds, face threats from climate change and pollution. An oil spill settlement funds a new phone app helping non-scientists to aid research on these birds.

The ceasefire agreement between the U.S, and Iran extends to Lebanon, but the fighting there has yet to stop and Israel says it is not withdrawing.

SpaceX stock hit the market last week. Here's how it could turn up in your retirement or investment portfolio.

What's brown and sticky? A stick, of course. NPR's Scott Simon talks to Paul Silvia, a psychology professor at UNC Greensboro, about new research on what makes a good dad joke.