Technology Underwater walkie-talkies could work long-distance with radio trick Divers often struggle to communicate because radio waves can’t travel far through water, but a way to send the ...

The U.S. Army, working with a startup called Rydberg Technologies, has achieved the world's first long-range radio communication with an atomic quantum receiver, a breakthrough that could greatly ...

New tools and exceptional seasons By 2014, the use of software-defined radios revolutionized long-distance FM reception. More DXers began logging signals. [Related: “SDR: The Next Level of Shortwave ...