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.

Solar advocates continue to fight what they call a “discriminatory” fee added to the utility bills of Arizona Public Service customers who have solar panels.

Zelenskyy said that Russia must fully adhere to the ceasefire conditions and reiterated Ukraine's offer to extend the truce for 30 days, starting midnight Sunday.

Sen. Chris Van Hollen, D-Md., tells NPR's Ayesha Rascoe about developments following his trip to El Salvador to meet with Kilmar Abrego Garcia.

Saturday saw more demonstrations in scores of cities as people expressed their opposition to the Trump administration.

At least two states are asking the federal government to prevent people on food stamps from buying soda and sugary candy.

A music teacher whose organist daughter was killed in a Russian missile attack last week returns to the classroom, as her Ukrainian hometown prepares for a mournful Easter.