Cosmic microwave background

Temperature map of the cosmic microwave background measured by the Planck spacecraft

01The pigeons roosting inside the horn antenna were trapped and relocated twice before the engineers accepted the hiss was cosmic.
02Penzias and Wilson won the 1978 Nobel Prize in Physics — accidentally, while testing satellite communication equipment.
03Princeton cosmologist Robert Dicke had been building a detector specifically to find this radiation; Penzias called him first, and Dicke told his team: 'We've been scooped.'

The eight "Chicago Black Sox"

In 1964, Bell Labs engineers Arno Penzias and Robert Wilson kept finding a 3.5K microwave hiss in their antenna; after scrubbing out pigeon droppings, they realized they were hearing radiation left over from the Big Bang, 13.8 billion years ago.