For decades, whispers of Project Sigma have haunted the hidden corridors of UFO history. Allegedly born in the shadow of Project Blue Book, Sigma’s purpose wasn’t to observe unidentified flying objects — it was to communicate with them. According to leaked documents, U.S. Air Force intelligence began experimenting in the 1950s with early computer code, attempting to send binary messages into deep space. By 1959, they supposedly succeeded — receiving a response that would lead to one of the most