A new trail in this southern Arizona city plots the most visitor-friendly astronomy stops—and there are plenty to choose from ...

Poor air quality has prompted officials to issue an ozone high pollution advisory for Maricopa County through Thursday.

A new trail in this southern Arizona city plots the most visitor-friendly astronomy stops—and there are plenty to choose from ...

A team of astronomers has created the largest 3D map of our universe to date and tracked dark energy’s influence on the ...

Six emerging artists will participate in the 2025 Namingha Institute, an immersive two-week fine art residency April 27 to ...

Hummingbird enthusiasts, your season has arrived. According to Hummingbird Central's Spring 2025 Sightings and Migration Map, ...

A team of astronomers has created the largest 3D map of our universe to date and tracked dark energy's influence on the ...

These clusters of cells are increasingly at the center of legal disputes, resulting in piecemeal decisions that have ...

US Geological Survey geologists estimated large potential for—and large uncertainty about—the amount of hydrogen ...

Senator Adam Schiff wants Trump to be investigated over potential insider trading and stock market manipulation.

Amid a surge in vandalism of Humane Borders’ life-saving water barrels in Arizona’s borderlands, volunteers with the ...

A proposed energy infrastructure project by Tucson Electric Power (TEP) and Unisource is drawing concern from residents of a ...