(Posted by: Alex)
Radios have been placed throughout the Aperture Science Enrichment Center in a recent update to Portal on the PC. When carried to a certain point in the map, each radio will begin broadcasting some sort of screeching, bleeping audio. The gaming community got to work fast on this mystery, and discovered that the audio file being played is actually Slow Scan Television signal, used by Ham Radio operators to broadcast images. The images above are the result. What does it mean? Who knows, but Valve will be at the Game Developers Conference that starts on the ninth, so keep an eye out and an ear open. Also, go ahead and examine this image, post any theories in the comments section.