On the evening of 27 November 1923, a mother in Connecticut sent Thanksgiving greetings to her son who was a great distance away, via radio.1 She paid nothing for this service since her message was handled entirely by amateur radio operators. Impressively, it arrived only six minutes after she dictated it to a local ham on the telephone, traveling more than 6,000 miles to reach its addressee. Since her son happened to be aboard a ship that was frozen motionless … Continue reading