A new study explains how two deep canyons formed very quickly on the moon during an asteroid impact. KNAU’s Melissa Sevigny spoke with local planetary scientist David Kring about the findings.

One of the top water officials in the West was pushed to resign by the Trump administration. Anne Castle served as a federal representative to the Upper Colorado River Commission.

Interior Secretary Doug Burgum has ordered federal officials to review and consider redrawing the boundaries of national monuments created under previous presidents to protect unique landscapes and cultural resources.

All kinds of animals use conspicuous colors. Research from biologists at the University of Arizona found it's a quirk of evolution that started around 150 million years ago.

The number of monarch butterflies spending the winter in western states like Arizona and California dropped dramatically even as federal officials move to extend protections for the pollinator.

A federal grand jury has indicted a Navajo man, his father and a business partner on charges that they were running illegal marijuana growing operations in New Mexico and on the Navajo Nation to supply the black market.

Tens of thousands gathered at the Vatican to hear the pope's traditional Easter message.

The Trump administration has halted work on the National Climate Assessment. It's the most comprehensive source of information about how climate change affects the U.S.

We talk about the songs that got us through the early days of parenting.

NPR's Miles Parks speaks with writer Emily Henry about her new novel, "Great Big Beautiful Life."

Maryland senator calls Abrego Garcia case a 'constitutional crisis,' a Louisiana senator says its a 'screw up'