Thanks to Donald for the question. In an attempt to unpick one of the mysteries facing astronomers over recent decades, James Tytko enlisted the help of former BBC science editor, David Whitehouse...

James - The Wow! signal was detected in 1977 at Ohio State University's Big Ear radio telescope. Astronomer Jerry Ehman observed an unusually strong signal originating from the direction of the Sagittarius constellation. On the printout chart, he circled the corresponding high numbers and wrote Wow! beside them.