How (a Lack of) Bird Poop Proved the Big Bang

The video discusses how some major scientific discoveries, like penicillin and the Big Bang evidence, were made by accident. It focuses on the story of Arno Penzias and Robert Wilson, who discovered cosmic microwave background radiation while trying to eliminate static from their microwave detector. Initially, they thought the static was interference from Earth or the Milky Way, but eventually realized it was evidence of the Big Bang. This discovery confirmed a key prediction of the Big Bang theory and earned them a Nobel Prize. The video concludes with acknowledgments to supporters.

What led Penzias and Wilson to conclude that the static was coming from outside our galaxy?

What was the outcome of Penzias and Wilson's discovery regarding the Big Bang theory?