The Arecibo telescope in Puerto Rico detected a radio signal similar to the Wow! signal.
NAIC/Arecibo Observatory/NSF
An unexplained radio signal detected in 1977 and known as the “Wow!” signal has sometimes been interpreted as an alien message, but it may actually be a natural galactic laser-like beam.
On August 15, 1977, Ohio State University's Big Ear radio telescope detected a brief, powerful radio wave burst with an unusually narrow frequency range similar to the natural emission frequencies of atomic hydrogen. Such radiation cannot be produced by any known astronomical process, so astronomer Jerry Ehrman, who worked at Ohio State University,…
Source: www.newscientist.com
