In the early summer of 1953, during the Cold War, a series of transmissions disguised as an educational astronomy show were sent on American wavelengths. All were about two minutes long, the last few being less than thirty seconds. Tracing them brought no results. Eventually they discontinued the attempts and sent a covert operation to the area they believed the transmissions to be coming from. While the explorers were there, a dozen more transitions came back to the station. They were deciphered and then archived in a government library. Light chuckling, then a cough. Continues to speak.