06/02/2026
God is good
📡 In 1963, Arno Penzias and Robert Wilson were calibrating a giant horn-shaped antenna at Bell Labs in Holmdel, New Jersey. They were trying to map faint radio signals from the Milky Way, and to do that, they needed to eliminate every source of background noise. But no matter what they did, a persistent, low-level hiss remained.
It was coming from every direction in the sky, at every hour, in every season. It wasn't the Sun. It wasn't the galaxy. It wasn't the antenna.
They even found pigeons nesting inside the horn and cleaned out what Penzias politely called "a white dielectric material." The hiss stayed.
It took months before they connected with a group of theorists at Princeton, led by Robert Dicke, who had been building their own antenna to search for exactly this kind of signal. Dicke's team instantly recognized what Penzias and Wilson had found. It was the cosmic microwave background, the afterglow of the Big Bang itself, a faint radiation left over from when the universe was just 380,000 years old and cooled enough for light to travel freely for the first time.
That light has been streaming through space ever since, stretched by the expansion of the universe into microwaves, cooled to just 2.7 degrees above absolute zero. It fills every corner of the cosmos. About 1% of the static on an old untuned television comes from it. You've been watching the Big Bang your entire life without knowing it.
When Dicke heard what Penzias and Wilson had detected, he turned to his colleagues and said, "Boys, we've been scooped." The two groups published their findings simultaneously. Penzias and Wilson received the 1978 Nobel Prize in Physics. The CMB became the single most important piece of evidence for the Big Bang theory and silenced the rival Steady State model almost overnight.