The silver mines of the Cerro Colorado Mining district in Santa Cruz County have attracted the attention of miners who worked the narrow quartz veins in sedimentary volcanic rocks for several hundred ...

Tucson escrow agent Charles C. Morgan's body was found lying near his new Mercury Cougar 40 miles west of Tucson 11 days after he disappeared in 1977. Morgan, 39 was wearing a bulletproof vest, a belt ...

Abstract: Intelligent reflecting surface (IRS) is an enabling technology to engineer the radio signal propagation in wireless networks. By smartly tuning the signal reflection via a large number of ...

A group of college students went on a tech fast for a week. Not only did they survive — they also learned more about themselves and the world around them. By Jeremy Engle Hear from journalists who are ...