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.

When Trump announced sweeping tariffs this month, he called it "Liberation Day." But there are fears that it may well have been the day foreign investors started to lose faith in the United States.

About 40% of women have dense or extremely dense breasts. Online risk assessment tools can help women decide if a breast MRI is a good idea.

Vilified by the Assad regime, these Nobel-nominated first responders operated only in rebel areas. Now their founder is in the new government and they're extending their reach to all of Syria.

The pope was a strong advocate for the poor and the environment and a towering figure on the world stage, addressing not just Catholics but the men and women of our time.

Vance arrived in India on Monday for a four-day visit as New Delhi looks to avoid U.S. tariffs, negotiate a bilateral trade deal with Washington and strengthen ties with the Trump administration.