Late one night in the summer of 1977, a large radio telescope outside Delaware, Ohio intercepted a radio signal that seemed for a brief time like it might change the course of human history.
Read more: http://en.wikipedia.org/wiki/Wow!_signal
The 'Wow!' Signal: One Man's Search for SETI's Most Tantalizing Trace of Alien Life
For decades, Robert Gray has been trying to duplicate the most surprising and still-unexplained observation in the history of the search for extraterrestrial life.