The radio, one of the niftiest inventions of the 20th century, has been informing, entertaining, outraging and boring millions of people for more than 100 years. It was called “magic in a box” by Col Robert R. McCormick, the owner of the Chicago Tribune who gave the world the venerable WGN-AM 720. I have to wonder what McCormick might have called radio had he lived long enough to hear the ...