With 3I/ATLAS streaking away from our planet, speculation remains as to whether the interstellar comet is alien or not.

With Tucson out of the picture for the Project Blue data-center complex, Marana has emerged as a possible prospect for a replacement location. Not only is the town of 62,000 people Pima County’s ...

"It's really not a question of robotic exploration or human exploration," Ehlmann said. "It is an 'and' — it's robotic and ...