But SETI did find something.
The Wow! signal was a strong narrowband radio signal detected by Jerry R. Ehman on August 15, 1977, while working on a SETI project at the Big Ear radio telescope of The Ohio State University then located at Ohio Wesleyan University's Perkins Observatory, Delaware, Ohio. The signal bore expected hallmarks of potential non-terrestrial and non-Solar System origin. It lasted for the full 72-second duration that Big Ear observed it, but has not been detected again. The signal has been the subject of significant media attention.
I'm no expert but its apperently an alphanumeric code "6EQUJ5" no one knows what it means.
BTW they call it the "WOW Signal" because because in the margin of the page Ehman pened in the word