The resulting Nankoweap landslide would have dumped enormous limestone boulders into the river corridor, creating a temporary ...

U.S. Agriculture Secretary Brooke Rollins closed the border to Mexican cattle for a second time after new reports of screwworm infestations.

The 80th anniversary of the Trinity Test arrives in New Mexico at a poignant moment in New Mexico’s nuclear legacy.

The first military zone, set up along a 170-mile stretch of border in New Mexico in April, came days after an executive order ...

More Americans are now eligible for compensation for health problems linked to radiation exposure from the atomic weapons ...

A meteorite that struck near Winslow, Arizona, about 56,000 years ago may have triggered a massive landslide in the Grand ...

5. Iowa: Yes, Iowa! The Hawkeyes will be led by quarterback Mark Gronowski, the former FCS player of the year, two-time national champion and 42-5 starter at South Dakota State. He’s Iowa fans’ reward ...

Adelita Grijalva beat back charges of “legacy” and embraced the memory of her father, Raúl Grijalva, to win the Democratic ...

The National Park Service is defending its handling of a lightning-sparked wildfire that destroyed the nearly century-old Grand Canyon Lodge and dozens of historic cabins, saying containment lines had ...

Adelita Grijalva will win the special Democratic primary in Arizona’s 7th congressional district, CNN projects.

Arizona’s top legal official is asking for federal laws to prohibit immigration enforcement agents from wearing facial coverings during raids.

Experts have sounded the alarm after determining that miles of new border wall slated for Arizona would cut off migration ...