Richard_at_work writes: "Thirty years ago today, the Big Ear radio telescope recorded a 72 second long signal that perfectly matched the expected signature of a signal that was not of local origin. This became known world wide as the 'Wow!' signal after the comment its discoverer, Dr. Jerry R. Ehman of SETI, scribbled in the margin of the print out, and while it has never been detected since, it has fueled arguments on both sides as to the existence of extraterrestrial life ever since."
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