Fire departments across Arizona are preparing early for wildfire season, especially in the wake of devastating fires in ...

Spring starts on March 20. Here's what to expect from the weather, according to four different expert forecasters. See what's ...

LOS ANGELES — Representatives of California, Arizona and Nevada are urging the Trump administration to take a different approach in confronting the problems of the water-starved Colorado River.

The DESI experiment shocked cosmologists with a hint that dark energy varies over time. Now, with more data, the conclusions hold up.

University of Arizona researchers are among a group of scientists who hope to discover what happened immediately after the Big Bang, when the universe expanded in a fraction of a ...

History and culture buffs appreciate the Arizona State Museum and the University of Arizona Museum of Art while shoppers enjoy Main Gate Square, a pedestrian-friendly shopping and dining area with ...

Hotels ranked on industry awards, guest reviews and hotel class ratings Unbiased content created by U.S. News editors Photo ...

An Arizona nonprofit is donating stuffed bears and sweaters to children impacted by the L.A. wildfires in hopes of comforting them during this difficult time.

While Resolution Copper is taking a proactive approach to meet its tremendous water needs, their actions may still have a ...

New results from Dark Energy Spectroscopic Instrument hint that the influence of mysterious force driving universe's accelerating expansion may change over time.

Arizona forward Trey Townsend knows first-hand that a low double-digit seed can win a first-round NCAA Tournament game: He ...

Findings from the Dark Energy Spectroscopic Instrument (DESI) suggest that dark energy could be evolving over time. If ...