Radio Signal Detected from Beyond the Solar System

Remember that WOW signal detected by SETI (Search for Extra-Terrestrial Intelligence) from 1977? The signal, witnessed by a project volunteer, was so strong that he quickly circled the indication on a printout and scribbled the phrase “Wow!” in the margin. Dubbed the Wow! signal, it's considered by some to be the most likely candidate from an artificial, extraterrestrial source ever discovered, but it's never been detected again.

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