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The man behind it was American astronomer David Todd, who in August of 1924 endeavored to listen to radio signals from, Martian mania was still in full swing back then, so the best — or at least most exciting — candidate for intelligent aliens was considered to be the Red Planet.
He recruited an inventor named Charles Francis Jenkins, who helped develop the first televisions, to his cause. From a lab, Jenkins's job was to operate a radio that fed the data from any intercepted signals into an invention of his that would print out the radio waves on paper. He fell short of his global ambitions. But somehow, he managed to convince the US navy to enforce intermittent periods of radio silence across the nation. All Todd asked for was for the airwaves to be clear for five minutes at the beginning of each hour for three days between August 21 and 24.And it paid off. As a spell of radio silence fell across the nation, Todd and Jenkins picked up an intriguing signal.
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