The Arecibo Message: Fifty Years of Cosmic Inquiry and the Rise of SETI
To the point
Frank Drake and Carl Sagan argued that the 1974 Arecibo message to Messier 13, encoding numbers, formulas, DNA, a human, the solar system, and the telescope, showed interstellar messaging was possible and helped launch SETI, debates about a larger network like Cyclops, and the idea that humanity’s broadcasts already form an expanding electromagnetic bubble as we seek life beyond Earth.
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