TV Static Contained Cosmic Microwave Background, But the Popular Story Oversimplifies

For several decades, anyone who tuned an analog television to a dead channel was, in a quiet and unacknowledged way, receiving photons released 380,000 years after the Big Bang — the oldest freely traveling light in the universe. The cosmic microwave background was genuinely present in the static, though it was a minor voice in a chorus of earthly noise, and no household set could ever have named it. What Penzias and Wilson accomplished at a New Jersey hilltop in the 1960s was not the detection itself, but the extraordinary labor of elimination that made recognition possible. With the retireme