Congressman Raúl Grijalva died in March after a yearlong battle with lung cancer. His death leaves big questions about what’s next for the southern Arizona district.

For thousands of years, humans gazed upward in wonder at the vast cosmic canvas above. That view is disappearing.

"Just as blue sunlight scatters in the Earth's atmosphere and makes the sun look slightly less blue, light from a strong blue ...

The Philippine Mars, a WWII-era flying boat, will be transported through Peoria late at night to minimize traffic disruption ...

Teledyne FLIR Defense, part of Teledyne Technologies Incorporated (NYSE:TDY), announced it has been awarded a four year, ...

More than 700km of driving range is promised by Hyundai’s new hydrogen fuel-cell car, which is due in Australia next year – but it may not be sold to the general public. Hyundai has unveiled its ...

A city celebrated for its food scene also provides hiking, cycling and stargazing in the natural beauty of the desert.

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

The National Weather Service shows Tucson could hit 100 degrees on Friday, blasting through a record 99 degrees on the same ...

Maryland Democratic Sen. Chris Van Hollen held an airport news conference after returning to the Washington area from El ...

Part of the Tucson's Astro Trail, the Fred Lawrence Whipple Observatory— the largest satellite facility of the Smithsonian ...