The Trump administration on Tuesday filed suit against Secretary of State Adrian Fontes for refusing to hand over voter registration and election records.

The marvels of the Grand Canyon extend beyond its dramatic scenery. Underground, vast cave systems hold clues to the region’s future climate.

Colorado ended the year with extremely low snowpack with readings at a third of the state’s measuring sites at or near record lows.

Internal emails between City of Page officials and developers show discussions about a controversial planned data center were going on as early as 2024.

Defense Secretary Pete Hegseth has announced that he is issuing a letter of censure to Sen. Mark Kelly over the lawmaker’s participation in a video that called on troops to resist unlawful orders.

Ahead of the next session, Arizona Democratic state lawmakers held a town hall on missing and murdered Indigenous peoples for input on the problems facing families, advocates and victims.

Federal officials are targeting Democratic-led states over alleged safety-net fraud. Critics worry a drumbeat of unfounded accusations could undermine public trust.

NPR's Short Wave talks about elephants' sniffing abilities, the remarkable migration of painted lady butterflies and a surprising discovery about the early universe.

Gus Van Sant's police thriller Dead Man's Wire is a true-crime dramatization of a 1977 hostage incident in Indianapolis.

After deadly floods hit Central Texas in July, families whose daughters died at a sleepaway camp are keeping their legacies alive. We speak to two parents who helped create the Heaven's 27 Foundation.

Former Venezuelan President Nicolás Maduro is expected to argue that his leadership role shields him from prosecution in the U.S.