Amid calls for slowing down AI development, new funding from Bill Gates' philanthropic organization will support education, healthcare, agriculture and language gaps.

Tree ring scientist Ceci Martinez says cottonwoods killed by border wall crews are at most 146 years old, not 200. They are still ecologically vital.

A flash flood killed two and hurt infrastructure. The Republic's Joan Meiners hiked into the Canyon and found flooding made worse by climate change.

A flash flood killed two and hurt infrastructure. The Republic's Joan Meiners hiked into the Canyon and found flooding made worse by climate change.

The EPA is proposing a change to the definition of “discharge of a pollutant” that would exempt moving boats and ships from pollution regulations.

74 likes, 3 comments - azcentral on September 1, 2026: "A severe flash flood on August 29, 2026, on the North Rim of the Grand Canyon killed two hikers and caused damage to the North Kaibab Trail and ...

The Justice Department is seeking to compel testimony from reporters who wrote about the new Air Force One. The Times called the move a “brazen act.”

Since 2011, the statewide standards have saved ratepayers an estimated $1.7 billion on electricity costs, while preventing pollution and grid strain.

Minister of the Interior issues message to department prefects as more high temperatures are forecast in France this July

The town has a history of igniting spot fires with its "famous" show. Neither neighborly fears nor the ongoing, nearby Pocket Fire have deterred them.

The Dragon Bravo Fire burned across 150,000 acres and destroyed the historic lodge at the North Rim, but work to repair it started almost immediately.

Iron and hydrogen peroxide trigger cell death via ferroptosis, which cascades killer molecules through the population, causing mass die-offs of algae.

The following is a statement from Writers Guild of America East members at Scientific American on today’s decision to sell Springer Nature and lay off staff: “Earlier today in an all-staff meeting we ...

The Pentagon has told lawmakers it needs roughly $80 billion, mostly to cover the cost of the war in Iran.

Research effort spanned 31 /2 years, funded by AZ Board of RegentsJoa

Despite challenges caused by warming, drying and overuse, researchers found opportunities for reducing evaporation and facilitating aquifer recharge.

YouTube video by Weather West

After 320,000 acres in northern Arizona were nominated for oil and gas leasing, where experts say no oil or gas exists, a public lands mystery began.

After 320,000 acres in northern Arizona were nominated for oil and gas leasing, where experts say no oil or gas exists, a public lands mystery began.

After 320,000 acres in northern Arizona were nominated for oil and gas leasing, where experts say no oil or gas exists, a public lands mystery began.

After 320,000 acres in northern Arizona were nominated for oil and gas leasing, where experts say no oil or gas exists, a public lands mystery began.

The work of Peter Aaby and Christine Stabell Benn has long been controversial. Until Robert F. Kennedy Jr. became US health policy chief, most vaccine scientists tended to ignore it. Now they can’t.

The northwestern part of Arizona, where nearly 80,000 acres may soon be offered for drilling, is not known to have substantial oil or gas reserves.

Phoenix leaders gathered along the Rio Salado to carve a new channel for solutions, one conference to rule them all and in the heat bind them.

Proposals to address western water deficits by importing eastern overflows resurface in times of drought. It's never our best option, experts say.

One week before Earth Day, the Department of Homeland Security announced trail closures for a double-layered border wall through a national park site.

President Donald Trump threatened to jail journalists who published details of a daring US military raid to rescue two airmen whose aircraft was shot down over Iran, accusing them of jeopardizing the mission.