Numbers stations are mysterious, unsettling, and one of the strangest things you'll ever hear. They're shortwave radio stations that send coded messages to undercover spies all over the world—an odd ...

Washington, D.C. (CTV Network) — In a world of mobile phones, satellites and the internet, some old school technology is making a major comeback. The shortwave radio, used by spies for decades to send ...

For all their talk of cooperation and shared interests, the nations of the world put an awful lot of effort into spying on each other. All this espionage is an open secret, of course, but some of ...

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For decades, mysterious shortwave radio broadcasts transmitted eerie sequences of numbers, tones, and robotic voices to ...

Add Yahoo as a preferred source to see more of our stories on Google. Numbers stations are a mysterious phenomenon of shortwave radio dating back to the Cold War. The radio signals are secret messages ...

Numbers stations are a mysterious phenomenon of shortwave radio dating back to the Cold War. The radio signals are secret messages sent by intelligence agencies to undercover spies all over the world, ...