Environmentalists and farmers are challenging Arizona's approval of an air pollution permit for Copper World Mine, claiming it's lax on toxic dust.

The desert city in southern Arizona is a sanctuary for stargazers—and now it's even easier for visitors to explore.

Usually, that is: Screenings at the Exposition Park theater will be free over several February days thanks to a partnership between the science center and IMAX Corporation. The Los Angeles fires and ...

Arizona State University's selection is a decorated and internationally renowned psychiatrist and innovator of ...

Environmental and community groups have appealed the Arizona Department of Environmental Quality’s decision to grant an air ...

Meta unveils a data center in Mesa with pledges of sustainability at a time when critics are raising louder concerns about ...

In February 1995, a small research organization known as the SETI Institute launched what was then the most comprehensive ...