Los ANGELES Correspondent John Wilhelm first seriously considered the possibility of extraterrestrial life four years ago while visiting the mam moth radio telescope at Arecibo, Puerto Rico. Pulsars radio signals now thought to emanate from rapidly rotating neutron stars in the far reaches of space had just been discovered. Arecibo Director Frank Drake let Wilhelm listen a audio signals originating light-years away. Recalls Wilhelm: "It was a little like putting a stethoscope to the heart of the universe. Drake did not dismiss the possibility, however slight, that pulsars might in fact be navigation beacons used by an advanced civilization....
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