The desert southwest skies were lit up with the northern lights! Several viewers sent in photos of last night's sky of the ...

The dream of accessible space travel is inching closer to reality. As private companies push the boundaries of space tourism ...

Arizona Gov. Katie Hobbs says Colorado and other upstream states aren't sufficiently committed to sharing and conserving ...

After testing since last year, Waymo is ready to start rolling out freeway driving in three cities for public riders.

Hidden in the embrace of the Sierra Nevada mountains lies a place so picturesque you’ll wonder if you’ve stumbled into a ...